Table 2.

Vertebrate chemokine receptor gene groups

Cluster (human)*	Chemokine Receptor Group	Human	Mouse	Cow	Elephant	Opossum	Wallaby	Platypus	Chicken	Zebra finch	Duck	Anole lizard	X. tropicalis†	Medaka	Stickleback	Zebrafish	Tetraodon‡	Elephant shark	Sea lamprey
	CXCR1/2G	2	2	2	2	2	–	2	1	–	1	2	1	3	3	2	3	2	–
	CXCR3G	1	1	1	1	–	–	–	–	–	–	1	1	4	2	2	2	–	–
	CXCR3LG	–	–	–	–	–	–	–	–	–	–	1	1	1	1	1	1	–	–
	CXCR4G	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	1	1
	CXCR5G	1	1	1	–	1	1	–	1	1	1	1	1	1	1	1	1	1	–
C	CXCR6G	1	1	1	1	1	–	2	–	–	1	1	1	–	–	–	–	1	–
C	CCR1/3G	2	3	3	2	2	1	2	–	–	–	–	–	–	–	–	–	–	–
C	CCR2/5G	2	2	2	2	2	–	2	2	2	2	3	–	–	–	–	–	–	–
C	CCR4G	1	1	1	1	1	1	1	1	1	1	1	–	–	–	–	–	1	–
	CCR4LG	–	–	–	–	–	–	–	–	–	–	–	–	3	2	3	2	–	–
	CCR6G	1	1	1	1	1	–	1	1	1	1	1	1	2	2	2	1	1	–
	CCR7G	1	1	1	1	1	1	–	1	1	1	1	1	1	1	1	1	1	–
C	CCR8G	1	1	1	1	2	–	–	2	3	3	–	1	–	–	–	–	–	–
C	CCR9G	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	1	–
	CCR10G	1	1	1	1	1	1	–	–	–	–	1	1	1	1	1	1	1	–
	CCR11G	–	–	–	–	–	–	–	–	–	–	–	–	2	4	3	1	–	–
	CCR12G	–	–	–	–	–	–	–	–	–	–	–	1	2	4	3	2	–	–
	CCR13G	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	2
C	CX3CR1G	1	1	1	1	1	–	1	1	1	1	1	–	–	–	–	–	–	–
C	XCR1G	1	1	1	–	1	–	1	1	1	1	1	1	4	2	6	2	3	–
	CXCR7G	1	1	1	–	1	1	1	1	1	1	1	1	1	–	2	1	1	2
C	CCBP2G	1	1	1	1	1	–	–	1	2	1	–	–	–	–	–	–	–	–
C	CCRL1G	1	1	1	1	1	1	1	1	2	1	1	1	2	2	2	2	–	–
C	CCRL2G	1	1	1	1	1	–	1	–	–	–	–	–	–	–	–	–	–	–
	DARC-G	1	1	1	1	1	–	–	–	–	–	1	–	–	–	–	–	–	–
	Total	23	24	24	20	23	9	17	16	18	18	20	16	31	29	33	24	14	5

^*‘C’ indicates chemokine receptor genes in the human major cluster (see also Fig. 3).

^†Genes identified in X. laevis are included.

^‡Genes identified in Takifugu rubripes are included.