Figure 1. Atomic structure of T4 and selection cycle schematic.

(A) Atomic structure of T4. The circled amino group is involved in the reaction with the Sepharose. (B) Schematic representation of the selection cycle used to isolate T4–aptamer. (C) Enrichment profile of the T4–aptamers. The percentage of T4-bound aptamers after each cycle is illustrated in histogram form.