The double helical structure of DNA, 3D animation with no audio
Description:
Based on available data from X-ray diffraction patterns and 3D conceptualization through model building, Watson and Crick proposed that DNA is a double helix "a twisted ladder" with two phosphate-based backbones and "runged" nucleotides that pair.
(DNAi Location: Code > Finding the Structure > Putting it together > Base pairing interactive)
Transcript:
Animation of 2D DNA model becoming three dimensional.
Keywords:
dna double helix,x ray diffraction,double helical structure,watson and crick,dna 3d,diffraction patterns,dna model,structure of dna,double helical structure of dna,3d animation,base pairing,dnai,location code,model building,conceptualization,backbones,phosphate,ladder
James Watson and Francis Crick explain how they solved the structure of DNA. Erwin Chargaff explain how he measured the levels of each of the four nitrogenous bases.
Although the chemistry was wrong, Linus Pauling's triple-stranded DNA model was a catalyst for James Watson and Francis Crick to solve the structure of DNA.