You can input integers ( 10 ), decimals ( 10.2 ), fractions ( 10/3) and Square Roots - (use letter r as a square root symbol). Input circle equation in standard or in general form. Z-DNA is one of the many possible double helical structures of DNA.It is a left-handed double helical structure in which the helix winds to the left in a zigzag pattern, instead of to the right, like the more common B-DNA form. The lines on the surface correspond to constant values of $t$ and $u$. The calculator will generate a step by step explanations and circle graph. As a result of rotation about 6 of its bonds, DNA can exist in a variety of forms. Here's the effect of the change to $a=1.0$. The general appearance of the polymere shows a periodicity of. The two strands are antiparallel (id est: their 5->3 orientations are in opposite direction). Here's what Mathematica-output looks like with parameters $h=1$, $R=3$, $a=0.4$: DNA is made of two ('duplex DNA') dextrogyre (like a screw right-handed) helical chains or strands ('the double helix'), coiled around an axis to form a double helix of 20A° of diameter. Its tangent vector can be gotten by differentiating In Z-form also, there is zig-zag plectonemic coiling. A single turn in B-form comprises 12 base pairs, which are perpendicular to the helical axis. The Z-form helix’s diameter is 18, and the base-pair tilt is 7, which is lower than the B and A-form.
We can use a local orthonormal basis of a parametrized curve to get a surface of the desired type.Ī helix running around the $x$-axis has a parametrization like The Z-DNA forms by the alternating stretching of purines and pyrimidines bases.
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