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CBC as a function of cna transcription. (A) CBC was determined by using type I collagen and cells taken from cultures in exponential (open bars) and post-exponential (hatched bars) growth. RN6390 was included as a cna-negative control. Error bars indicate standard deviations based on two assays. (B) Northern blotting done with a cna probe and total cellular RNA from early-exponential (E)- and post-exponential (P)-phase cultures of the six cna-positive strains shown in panel A.
