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Watson R.B., Wallis G.A., Holmes D.F., Viljoen D, Byers P.H., Kadler K.E. Ehlers Danlos syndrome type VIIB: incomplete cleavage of abnormal type I procollagen by N-proteinase in vitro results in the formation of copolymers of collagen and partially cleaved pNcollagen that are near circular in cross-section. - J.Biol.Chem., 1992, v. 267, p. 9093-9100.
