Lines Definition and 1000 Threads

Long interspersed nuclear elements (LINEs) (also known as long interspersed nucleotide elements or long interspersed elements) are a group of non-LTR (long terminal repeat) retrotransposons that are widespread in the genome of many eukaryotes. They make up around 21.1% of the human genome. LINEs make up a family of transposons, where each LINE is about 7,000 base pairs long. LINEs are transcribed into mRNA and translated into protein that acts as a reverse transcriptase. The reverse transcriptase makes a DNA copy of the LINE RNA that can be integrated into the genome at a new site.
The only abundant LINE in humans is LINE1. The human genome contains an estimated 100,000 truncated and 4,000 full-length LINE-1 elements. Due to the accumulation of random mutations, the sequence of many LINEs has degenerated to the extent that they are no longer transcribed or translated. Comparisons of LINE DNA sequences can be used to date transposon insertion in the genome.

View More On Wikipedia.org
Recent contents Top users
  1. B

    How Does Electric Field Direction Relate to Equipotential Lines?

    Homework Statement The equipotential curves in a certain region of an equipotential diagram in an xy plane are parallel to the y-axis and are equally spaced. The potential is increasing in the +x direction. Which direction would an electric field vector point in this region? Homework...
  2. Raerin

    MHB How to find the intersection point between two lines

    How to find the intersection point between two lines? line 1: r = (3,1,-1) + s(1,2,3) line 2: r = (2,5,0) + s(1,-1,1)
  3. Einj

    Find atomic number from spectral lines

    Homework Statement An atom or ion with one electron has energy levels E_n=-A/n^2. Tw neighboring lines in its spectrum at room temperature have wavelengths \lambda_1=97.5 nm and \lambda_2=102.8 nm. (Note that hc=1.240\times 10^{-6} eV m). (a)What is the constant A? (b) Identify the atom...
  4. C

    Revolution about horizontal and vertical lines

    Homework Statement Use shell method to find volume. y=x+2 y=x^2 rotate about the x-axis 2. The attempt at a solution I cannot seem to solve this. I thought this was the way to solve it, but I don't understand if I am missing something crucial. This is how I set up the...
  5. A

    What is the World Line Diagram for Light Pulses in Two Frames?

    Homework Statement A light source at the origin of the O frame emits short pulses of light in interval of \tau as measured in O. An observer located at the origin of the O' frame which moves at velocity v with respect to O along the x-axis, receives these light pulses. Use a world line...
  6. K

    MHB Trigonometric inequality bounded by lines

    How can it be shown that $$16x\cos(8x)+4x\sin(8x)-2\sin(8x)<|17x|?$$ This problem arises from work with damped motion in spring-mass systems in Differential Equations. I have gotten to this inequality after some algebraic manipulation, but am completely stuck here. Here is the illustrative...
  7. M

    What's wrong with this diagram of magnetic field lines?

    I was looking through a book on magnetism and it had the attached diagrams of field lines and stated that the classical diagram of field lines exiting the N pole and entering the S pole is incorrect. They claim their diagram is the correct representation of the magnetic field lines. Their...
  8. A

    Magnetic Field Lines: What Causes Gaps?

    Hello All, I was just checking magnetic field lines as in attached figure. I am curious to see some gaps between adjecent field lines in the figure. Why it is not like a sheath( for example in lighting field) but as lines? Thanx in advance Abraham
  9. U

    How Do EM Waves Behave in Transmission Lines with Varying Frequencies?

    Homework Statement (a) Find the capacitance per unit length and find the inductance per unit length of a transmission wire above a infinite conducting plane. I used the image method (b) Show that EM waves can propagate, and find their speed and the characteristic impedance of the line...
  10. Entanglement

    Wire cutting magnetic field lines

    I have read in my schoolbook that when a wire of length l moves at velocity v in a magnetic field cutting the flux lines an emf is induced which it is calculated from emf = blv, I understand that emf is induced at time variation of magnetic flux across the wire, but I Can't see any change in the...
  11. A

    Very simple Lines of Force question

    "The figure below is a lines of force representation of an electric field." "In the figure above is the electric field stronger at point X or point Y What evidence in the diagram indicates that this is the case?" My answer: Y. Because the lines of force are closer together. In what direction...
  12. U

    Lines resolved by the instrument

    Homework Statement A spectroscopic instrument can resolve two nearby wavelengths λ and λ+Δλ if λ/Δλ is smaller than 8000. This is used to study the spectral lines of the Balmer series of hydrogen. Approximately how many lines will be resolved by the instrument. The Attempt at a Solution...
  13. J

    Are There Surfaces of Force in Addition to Lines of Force in Fields?

    I think everyone has heard about equipotential lines and equipotential surfaces; such as lines of force too. My question is: exist surface of force too? If yes, what is it?
  14. O

    Are gluon lines drawn in opposite directions the same in Feynman diagrams?

    I draw Feynman diagrams in JaxoDraw. But If I draw gluon line up to down or down to up, I get different results for gluon lines. I share a picture to explain my problem. Are these two diagrams the same? http://img809.imageshack.us/img809/3184/rq9z.jpg
  15. U

    Drawing constant property lines on p-v/T-s/u-s diagrams

    Hi All, I'm really curious to know how we can predict the shapes of constant property lines (isenthalpic/constant internal energy/isotherms/isentropes/isobars) on any given plot, such as T-s and P-v or even u-s diagrams. Is there a rule to do so? Usually in practice we deal with p-v and T-s...
  16. xortdsc

    Field lines of electrons in an atomic orbital

    Hello, I have a rather conceptual question I couldn't really find an answer to yet. The electric field lines of an isolated resting electron would simply point from everywhere in space towards the position the electron is located in, with a length inversely proportional to the squared distance...
  17. M

    Double integral: Two lines and one curve

    My problem: I don't know how to begin with this problem.
  18. T

    Surveying Problem Relating To Circles & Lines

    Hello all I am hoping someone could help shed some light on a surveying problem I am having. The problem is this:- • A circle is centered at point B with Known co-ordinates (X2,Y2) • The circle has a radius which is known (R). • Point A lays outside of the circle with known...
  19. R

    Hyperbolic geometry - relations between lines, curves, and hyperbolas

    Hi. I studied calculus a while back but am far from a math god. I have been reading around online about hyperbolic geometry in my spare time and had a simple question about the topic. If a straight line in Euclidean geometry is a hyperbola in the hyperbolic plane (do I have that right?)...
  20. R

    How to graph equipotential lines of two charges?

    The two charges are (-q) and q. I'm just curious as to how you go about graphing them. Thanks!
  21. MarkFL

    MHB Find Tangent Lines Through Origin to a Circle

    Here is the question: I have posted a link there to this thread so the OP can see my work.
  22. G

    Spectral lines from multiple atoms

    Homework Statement "A gas discharge tube contains H 1 , H2, He 3 , He4, Li6, and Li7 ions and atoms (the superscript is the atomic mass), with the last four ionized so as to have only one electron. (a) As the potential across the tube is raised from zero, which spectral line should appear...
  23. N

    Equation of a Plane with Three Points

    Equation of plane containing points (a,0,0) (0,b,0) (0,0,c) Vectors <-a,b,0> <-a,0,c> Normal vector <bc,ac,ab> Plane Bc(x-a)+ac(y-b)+ab(z-c)= Bcx+acy+Abz=3abc Book is showing = abc
  24. M

    Higer dims: Electromagnetic field lines and stereographic projection

    I've noticed that electromagnetic field lines are very similar to stereographic projection of 3D sphere on 2D surface. Pictures below. In such comparison, electric field represents longitude and magnetic field represents latitude. For more visualization see...
  25. T

    P = VI = (281V)(3.75A) = 1054 W

    Homework Statement A small power plant produces a voltage of 6.0 kV and 150 A. The voltage is stepped up to 240 kV by the transformer before it is transmitted to a substation. The resistance of the transmission line between the power plants and the substation is 75 Ohms. What percentage...
  26. C

    How Do You Calculate the Direction Cosines of a Reflected Line?

    write the equation of the plane x - 2y - 2z = 27 in the form r.\hat{n} = d done write down the distance of the origin from the plane and show that the point which is the reflection of the origin is (6, -12, -12) done A second point P has coordinates (-3,2,1). Find the direction cosines of...
  27. D

    Uncertainties in gradients and best-fit lines

    Hi, I hope I'm asking this in the right place. I need to understand this in order to complete a project, but it's not exactly a 'homework question'. I have some data which has a linear trend. The x values all have the same (random) uncertainty of ≈5cm and the y values all have the same random...
  28. U

    Straight lines passing through fixed point

    Homework Statement If all the lines given by the equation (3\sin \theta + 5\cos \theta )x+(7\sin \theta - 3\cos \theta )y+11(\sin \theta - \cos \theta)=0 pass through a fixed point (a,b) forall theta in R then |a-b|= Homework Equations The Attempt at a Solution Dividing both sides by...
  29. T

    Wavelength on power transmission lines

    At the power-line frequency (50Hz), the wavelength of electromagnetic waves in free space is 6,000 km. Similarly, the phase velocity of voltage/current waves is about 4,000 km at this frequency. The question is, why do we bother about the wavelength at all at the power-line frequency, when the...
  30. applestrudle

    Difficulty picturing skew lines

    Is there only one point where the line connecting the two skew lines is perpendicular to them both? And is that point always always always the place of closest approach? Thank You
  31. E

    LaTeX Parallel Lines between Two Blocks (Latex)

    Hello all, I have two blocks, and I want to draw multiple parallel lines between them. This is the Latex code I have \documentclass{article} \usepackage{tikz} \usetikzlibrary{shapes,arrows,fadings, shadows} \usepackage{amsmath,bm,times} \begin{document} \pagestyle{empty}...
  32. M

    Fortran Comparing line in one file to multiple lines in another/FORTRAN

    Hi y'all I am trying to compare two files, so make one line from one file be compared to alll the lines in the other file until it finds a match where the difference is less than 0.003. This what I had thought of, but I still think it is just comparing line by line, instead of one line to...
  33. S

    Distance between two lines in R^3

    Homework Statement Let line L1 be the line through origin O and the point B(2,-1,-2). Let line L2 be the line through point A(3,1,-1) with direction vector i-j-k. Obtain a vector n, orthogonal to both lines. Use n and the vector OA connecting the lines to find the shortest distance between...
  34. karush

    MHB #23 intersecting vector equations of 2 lines

    the calcs are mine, the only way I could see to solve this was to convert these to the $y=mx+b$ line eq and solve simultaneously to the intersection of $(x,y)$ not sure how you take them as they are given and find point P the intersection just as vectors. also, I tried to input a vector...
  35. N

    Are There Other Equations for Lines Besides <x0+at,y0+by,z0+tz>?

    I have a question about the equation of a line Are the forms <x0+at,y0+by,z0+tz> And t=(x-x0)/a=(y-y0)/b=(z-z0)/c only for straight lines?
  36. B

    Transmission Lines: Carry Power & Comm Frequency

    how transmission carry both power frequency(50Hz) and communication frequency (MHz) at a time
  37. H

    Spectral Line Question: True or False?

    This lady who takes our class, she set this question in one of our papers: 'The wavelengths of the dark lines are exactly the same as those of bright lines in the absorption spectrum.' - True or false? I answered true. Have I been wrong?
  38. T

    Calculating Magnetic Field Lines

    I guess this is maybe more of a vector calculus question, but here it goes. Say I have an arbitrary current distribution \vec{J} with the corresponding magnetic field given by \vec{\nabla}\times\vec{H} = \vec{J} \vec{\nabla}\cdot\vec{H} = 0 What is the best way to calculate the field/flow...
  39. L

    High symmetry points and lines in Brillioun Zone

    Hi, I've seen pictures like this one: http://www.lcst-cn.org/Solid%20State%20Physics/Ch25.files/image002.gif Is there any good explanation somewhere on this subject? I'm using Kittel's book but there's nothing in there on this.
  40. B

    V of 2 parallel lines makes cylinders

    Homework Statement Expanded from Griffith's (3rd ed) #2.47 Infinitely long wires parallel to x-axis carrying ±λ charge densities intersect the y-axis at ±a. A) Calculate V(x,y,z) if V(0,0,0)=0 B)Show that the equipotential surfaces are circular cylinders. Locate the axis and calculate...
  41. J

    Gaussian Surfaces and infinite lines of charge

    So I've been wondering.. from my previous post: https://www.physicsforums.com/showthread.php?p=4500082#post4500082 if we have a plane of infinite charge, then electric field does not depend on distance however, for a infinite line of charge: If we use a cylinder with radius 'r' as our...
  42. J

    Regarding electric field lines

    So if you have one positive charge and one negative charge (both with the same arbitrary number of field lines) close to each other, could you theoretically move a 2nd positive charge as close as desired to the first positive charge without them repelling? Or am i misunderstanding the concept of...
  43. B

    Straight lines and flat surfaces

    Suppose I have a parameterized line ##\phi:\mathbb{R}\to\mathbb{R}^n## given by ##\phi(t) = (x^\mu(t))|_{\mu=1}^n##. How can I tell that the line is straight. My best answer so far is that at every time ##t## the acceleration (2nd derivative) is parallel to the velocity (1st derivative), i.e...
  44. 5

    Find the equation of lines to an ellipse

    Homework Statement Find the equation of the tangent, and the line which passes through the origin to the point where x= 3/2 4x2+9y2 = 36Homework Equations The Attempt at a Solution Using implicit differentiation d/dy [4x2+9y2] =36 8x+18y dy/dx = 0 dy/dx = -8x/18y Coordinates are (1.5...
  45. A

    Vertical lines on postion vs. time graphs.

    I understand how position vs. time diagrams can give velocity. If the line is flat then the velocity is zero (the particle is still), and all the other basic things I need to know, but what if the line was vertical? The slope would be undefined; therefore, velocity would be undefined. In...
  46. FeDeX_LaTeX

    Intersection of Lines (Vectors)

    Homework Statement Show that if the two lines ##\frac{x - c_1}{d_1} = \frac{y - c_2}{d_2} = \frac{z - c_3}{d_3}## and ##\frac{x - d_1}{c_1} = \frac{x - d_2}{c_2} = \frac{x - d_3}{c_3}## intersect, they lie in the plane ##r.(c \times d) = 0## where c = c1i + c2j + c3k and d = d1i +...
  47. M

    Influence lines (concentrated load system)(with the problem this time)

    I started by getting the equation for the reaction(which is really simple). I'm a bit confused here, they're asking for the absolute maximum moment, but they're not locating the location of where the maximum moment will occur, should I assume it's happening on the middle of the beam? And another...
  48. M

    Influence lines (concentrated load system)

    I started by getting the equation for the reaction(which is really simple). I'm a bit confused here, they're asking for the absolute maximum moment, but they're not locating the location of where the maximum moment will occur, should I assume it's happening on the middle of the beam? And another...
  49. MarkFL

    MHB Find Where Two Tangent Lines Intersect on a Circle | Math Help

    Here is the question: I have posted a link there to this topic so the OP can see my work.
  50. Z

    'Expansion' of fluid world lines

    hello In MTW excercise 22.6, given a fluid 4-velocity u, why the expression : ∇.u is called an expansion of the fluid world lines ? Is the following reasoning correct ? We know that the commutator : ∇BA - ∇AB is (see MTW box 9.2) is the failure of the quadrilateral formed by the vectors...
Back
Top