Fig. 1.

Schematic presentation of the structure of plastocyanin (PDB ID code 1baw). (a) The sequences of amino acids in chain A. The arrows show the strands, with strand numbers assigned sequentially from the N terminus of the sequence. (b) The domain consists of two sheets, containing the strands 2, 1, 4, and 7 in one sheet and the strands 3, 9, 8, 5, and 6 in the other one. (c) Secondary structure motif, representing the arrangement of the strands in sheets A and B. (d) Supersecondary structure supermotif, representing the arrangement of the strandons in sheets A and B.