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8gqq is a 1 chain structure with sequence from Dictyostelium discoideum AX3. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
CYTA2_DICDI Intracellular thiol proteinase inhibitor. Inhibits cathepsin B, but not papain.[1]
References
↑ El-Halawany MS, Ohkouchi S, Shibata H, Hitomi K, Maki M. Identification of cysteine protease inhibitors that belong to cystatin family 1 in the cellular slime mold Dictyostelium discoideum. Biol Chem. 2004 Jun;385(6):547-50. PMID:15255188 doi:10.1515/BC.2004.065