4XZ5:
reference: Structural and biophysical characterization of the alpha-carbonic anhydrase from the gammaproteobacterium Thiomicrospira crunogena XCL-2: insights into engineering thermostable enzymes for CO2 sequestration., Diaz-Torres NA, Mahon BP, Boone CD, Pinard MA, Tu C, Ng R, Agbandje-McKenna M, Silverman D, Scott K, McKenna R, Acta Crystallogr D Biol Crystallogr. 2015 Aug 1;71(Pt 8):1745-56. doi:, 10.1107/S1399004715012183. Epub 2015 Jul 31. PMID: 26249355

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