3AYK:
reference: NMR solution structure of the catalytic fragment of human fibroblast collagenase complexed with a sulfonamide derivative of a hydroxamic acid compound., Moy FJ, Chanda PK, Chen JM, Cosmi S, Edris W, Skotnicki JS, Wilhelm J, Powers R, Biochemistry 1999 Jun 1;38(22):7085-96. PMID: 10353819

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