Human type I procollagen genes are located on different chromosomes.

Abstract
A recombinant plasmic containing sequences complementary to human pro-.alpha.1(I) collagen mRNA was used for the chromosomal assignment of the pro-a1(I) collagen gene. Restriction endonuclease analysis of DNA from mouse-human and Chinese hamster-human somatic cell hybrids revealed cosegregation with human chromosome 17. Hybrids containing derivative chromosomes with a t(2;17)(q14;q21) translocation showed cosegregation of the pro-A1(I) gene with the segment 17q21 .fwdarw. qter. In situ hybridization on human metaphasic chromosomes confirmed this conclusion.