Rabbit articular cartilage synthesizes type II collagen, comprised of alpha1(II) chains, in vivo or in vitro. Chondrocytes from the same tissue have the ability to produce type I chollagen with the chain composition 2alpha(I)-alpha2 or type II collagen, depending upon the culture systems in which they are maintained. Type I collagen and its precursors have been identified in the medium of monolayer cultures. Upon transfer from monolayer to suspension cultures, the cells synthesize type II collagen in the medium devoid of CaCl2 and type I collagen and its precursors in the complete medium.
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Deshmukh et al. (1976) studied this question.
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