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J Biol Chem. 1988 Dec 25;263(36):19488-93.

The complete primary structure of the alpha 2 chain of human type IV collagen and comparison with the alpha 1(IV) chain.

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  • 1Department of Biochemistry, University of Oulu, Finland.


The complete primary structure of the human type IV collagen alpha 2(IV) chain has been determined by nucleotide sequencing of cDNA clones. The overlapping cDNA clones cover 6,257 base pairs with a 5'-untranslated region of 283 base pairs, the 5,136-base pair open reading frame, and the 3'-untranslated region of 838 base pairs. The predicted amino acid sequence demonstrates that the complete translation product consists of 1,712 residues corresponding in molecular weight to 167,560. The translated polypeptide has a signal peptide of 36 amino acids, an amino-terminal noncollagenous part of 21 residues, a 1,428-residue collagenous domain with 23 interruptions, and a carboxyl-terminal noncollagenous (NC) domain of 227 residues. The calculated molecular mass of the mature human alpha 2(IV) chain is 163,774 Da.

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