passages.id: split_8_test_1676_passage
passages.type: progene_text
passages.text: In an attempt to develop insight into additional possible subtle roles of CXCR2 and its ligands in the development of the mouse , we examined the expression of MIP-2 , KC , CXCR2 , as well as the Duffy antigen binding protein for chemokines during embryonic ( p.c. ) days 11.5 through 14.5 in the mouse .