6BSU:
reference: Structure of xyloglucan xylosyltransferase 1 reveals simple steric rules that define biological patterns of xyloglucan polymers., Culbertson AT, Ehrlich JJ, Choe JY, Honzatko RB, Zabotina OA, Proc Natl Acad Sci U S A. 2018 May 21. pii: 1801105115. doi:, 10.1073/pnas.1801105115. PMID: 29784804

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