Fig. 1. Interactive Figure Legends

Fitting of a B-DNA dodecameric portal assembly shows that the contacts between any one gp20 molecule and the DNA are confined to three polypeptide loops separated from each other by approximately one DNA helical turn. These occur at the end of the crown region (inner clip loop),

at the loop near the amino end of a7 in the stem domain annotation No.5 (inner clip loop),

and at the tunnel loop. (inner clip loop),

and at the example. (inner clip loop),