double-stranded Helix DNA model
triple helix (DNA)
X-ray diffraction pattern of DNA
adenine
thymine(胸腺嘧啶)
guanine
cytosine
无胸腺嘌呤
double-stranded Helix DNA model
triple helix (DNA)
X-ray diffraction pattern of DNA
adenine
thymine(胸腺嘧啶)
guanine
cytosine
无胸腺嘌呤