passages.id: split_5_test_450_passage
passages.type: progene_text
passages.text: The gene encoding the chicken chemokine 9E3 / CEF4 was cloned , sequenced , and mapped ; 9E3 / CEF4 was the first nonmammalian cytokine cDNA to be cloned and has significant amino acid identity with both human IL8 and human GROalpha .