the gene is 1,329 nucleotides long and possesses a single long open reading frame that starts at the first initiation codon ( residue 19 ) and extends for 331 codons , sufficient to encode a protein of the same size as the known s2 gene product , protein sigma 2 , a major reovirus core component ( mr , 38,000 ) .
C0242610
starts
C0009221
codons