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. 2019 Sep 16;14(9):e0213052. doi: 10.1371/journal.pone.0213052

Fig 7. Comparison of the cavity capping residues of lipocalins.

Fig 7

In Can f 6, at the entrance of the calyx cavity His87 in L5 stabilizes L1 over the ligand binding mouth. Arg41 and Asp91 stabilizes His87 and the L1 loop and are highly conserved indicating a common capping mechanism between lipocalins. The His in Can f 6 is unique compared to a highly conserved Tyr that is observed in the other lipocalins reflecting a unique ligand binding mechanism. Volume map is portrayed in red as Connolly surfaces (26).