passages.id: split_1_test_77_passage
passages.type: progene_text
passages.text: The nucleotide sequences of almost all the LINE homologues were greatly diverged , but the derived amino acid sequences were well conserved , and all contained glutamic acid and tyrosine residues at almost the same relative positions as in the the active site regions of AP ( apurinic / apyrimidinic ) - endonucleases .