Large-scale identification of odorant-binding proteins and chemosensory proteins from expressed sequence tags in insects

Table 3 Coefficients of variation of the C-pattern in OBP and CSP genes

Protein	Order	Sequence number	Coefficient of variation
			C1-C2	C2-C3	C3-C4	C4-C5	C5-C6
OBP	Lepidoptera	86	6.22	0	3.66	14.08	0
	Coleoptera	34	12.50	0	6.52	12.43	0
	Diptera	135	14.65	0	6.02	17.17	0.09
	Hemiptera	34	7.16	0	4.54	16.50	0
	Hymenoptera	254	11.66	0	3.75	8.10	0
	Orthoptera	4	1.90	0	6.71	20.16	0
CSP	Coleoptera	26	6.45	0	0	-	-
	Diptera	23	6.85	1.16	0	-	-
	Hemiptera	34	4.02	1.32	0	-	-
	Hymenoptera	31	9.70	2.69	0	-	-
	Lepidoptera	87	3.08	1.02	0	-	-
	Orthoptera	29	10.87	1.03	0	-	-

The coefficient of variation (CV) was calculated as Standard deviation divided by Means. In Diptera, the data for OBPs were calculated from OBPs of only 6-C pattern. The accession numbers of OBPs and CSPs used in this analysis were listed in Additional File 6.