passages.id: split_1_test_3490_passage
passages.type: progene_text
passages.text: The cotG open reading frame is 195 codons in length and is capable of encoding a polypeptide of 24 kDa that contains nine tandem copies of the 13 - amino - acid long , approximately repeated sequence H / Y-K-K-S-Y-R / C-S / T-H / Y-K-K-S-R-S .