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Nucleotide and deduced amino acid sequences of SIR cDNAs. Six distinct cDNA sequences were obtained by subcloning the 443-bp fragment amplified by RT-PCR from salmon gill cartilage as described in the text. Nucleotides which are identical in all six cDNAs are boxed. (Lower) The deduced amino acid sequences are compared with human IR, IGF-1R, and IRR. Amino acids that are identical in all nine sequences are boxed.
