5Z4W:
reference: A glycoprotein from mammary gland secreted during involution promotes apoptosis: Structural and biological studies., Chaudhary A, Kumar V, Singh PK, Sharma P, Bairagya HR, Kaur P, Sharma S, Chauhan SS, Singh TP, Arch Biochem Biophys. 2018 Mar 7;644:72-80. doi: 10.1016/j.abb.2018.03.006. PMID: 29524427

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