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A hypothetical model of the T4 ligase-gp45-DNA ternary complex. Molecular surface of a gp45 ring and ribbon model of T4 DNA ligase are shown. The color scheme for T4 DNA ligase follows that in Figure 1. The peptides occupying two remaining binding sites on the gp45 trimer are shown in pink. The modeling exercise suggests that the DBD/NTD might potentially interact with an inter-subunit cleft on the gp45 trimer.
