FIG. 1.

(Left) Sequence motifs characteristic of glycosaminoglycan modification are shown as spheres on the part of the capsid subunit structure that is common to VP1, VP2, and VP3 (58). Asn₄₉₆ to Ser₄₉₈ and Asn₅₁₉ to Ser₅₂₁ are on outer loops near the three- and five-fold axes respectively. (Right) In the assembled capsid, these sequences are in prominent positions on the outer surface. Asn₄₉₆ to Ser₄₉₈ are shown in blue near the tips of protrusions that surround each three-fold axis. Asn₅₁₉ to Ser₅₂₁ are shown in green near the five-fold axes.