2AYH:
reference: Crystal and molecular structure at 0.16-nm resolution of the hybrid Bacillus endo-1,3-1,4-beta-D-glucan 4-glucanohydrolase H(A16-M)., Hahn M, Keitel T, Heinemann U, Eur J Biochem 1995 Sep 15;232(3):849-58. PMID: 7588726

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