3GZ0:
reference: Apo-Human Carbonic Anhydrase II Revisited: Implications of the Loss of a Metal in Protein Structure, Stability and Solvent Network., Avvaru BS, Busby SA, Chalmers MJ, Griffin PR, Venkatakrishnan B, Agbandje-McKenna M, Silverman DN, McKenna R, Biochemistry. 2009 Jul 7. PMID: 19583303

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