CXCR3 and infection: To verify that donor NK cells exhibit similar CXCR3-dependent localization in recipient mice after infection,26 we transferred CD45.2+ NK cells from the spleens of C57BL/6 or Cxcr3-deficient (Cxcr3 KO) mice into JAXBoy (CD45.1+) recipient mice (Fig. 3A).