1I84:
reference: Three-dimensional image reconstruction of dephosphorylated smooth muscle heavy meromyosin reveals asymmetry in the interaction between myosin heads and placement of subfragment 2., Wendt T, Taylor D, Trybus KM, Taylor K, Proc Natl Acad Sci U S A 2001 Apr 10;98(8):4361-6. PMID: 11287639

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