DNA strands are antiparallel, running in opposite directions (5' to 3' and 3' to 5'), and parallel due to the constant distance between strands maintained by purine-pyrimidine pairing.
DNA strands are antiparallel, running in opposite directions (5' to 3' and 3' to 5'), and parallel due to the constant distance between strands maintained by purine-pyrimidine pairing.
| Front | DNA antiparallel structure 2.1.3(a),(d) |
|---|---|
| Back | - anti parallel as each strand has PO4 group (5`) at one end and a OH group (3`) at other end, nut each strand run in opposite directions, so one from 5`3 and one from 3`5 - parallel as there is always constant distance between strands (always 1 purine with 1 pyrimidine) |
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