Abstract
Several overlapping cDNA clones corresponding to the entire coding sequence of the mouse α1(V) collagen gene ( Col5a1) were isolated. The conceptual amino acid translation indicated a high degree of sequence identity (94%) with the human α1(V) chain. All of the important structures previously noted in the human α1(V) chain were also conserved in the mouse chain. The α1(V) transcripts were easily detected in mouse embryos as early as 11 days post coitum (d.p.c.). The transcripts were widely distributed in non-cartilaginous and cartilaginous tissues. Finally, we calculated the ratio of transcripts of α1(V): α2(V): α1(XI) in the calvaria and tongue of 18 d.p.c. embryos using the competitive reverse transcription-polymerase chain reaction (RT-PCR) technique. The results raised the possibility that there are at least two different kind of types V/XI collagen heterotrimers in mouse embryonic tissues.
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