Additional file 7.

Figure S2: Helix/β-sheet transition. Three pair protein structures are shown, with existing helix/β-sheet transitions and the equivalent zone marked yellow. (A) 1DSE: A and 2AS3: A, PF00141, 69Y, 70R; (B) 1AIG: M and 1PSS: M, PF00124, 26A, 27N; (C) 1GJM: A and 1T87: B, 82R, 83E, 86E, 87A. Besides these structure pairs, there are a total of nine families of helix/β-sheet transitions: PF00061, PF00124 and PF00139 are not enzymes; PF00067, PF00141 and PF00186 are enzymes with coenzymes and PF00215, PF00561 and PF01048 are enzymes without coenzymes.

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Zhang and Su BMC Bioinformatics 2012 13(Suppl 15):S12   doi:10.1186/1471-2105-13-S15-S12