1HIW:
reference: Crystal structures of the trimeric human immunodeficiency virus type 1 matrix protein: implications for membrane association and assembly., Hill CP, Worthylake D, Bancroft DP, Christensen AM, Sundquist WI, Proc Natl Acad Sci U S A 1996 Apr 2;93(7):3099-104. PMID: 8610175

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