1QSU:
reference: Staggered molecular packing in crystals of a collagen-like peptide with a single charged pair., Kramer RZ, Venugopal MG, Bella J, Mayville P, Brodsky B, Berman HM, J Mol Biol 2000 Sep 1;301(5):1191-205. PMID: 10966815

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