1XHN:
reference: The crystal structure of CREG, a secreted glycoprotein involved in cellular growth and differentiation., Sacher M, Di Bacco A, Lunin VV, Ye Z, Wagner J, Gill G, Cygler M, Proc Natl Acad Sci U S A. 2005 Dec 20;102(51):18326-31. Epub 2005 Dec 12. PMID: 16344469

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