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

Table 2 Conserved C-Pattern in OBPs and CSP

Protein	Order	Sequence number	C-Patten
OBP	Lepidoptera	68	C1-X_25-30-C2-X₃-C3-X_36-42-C4-X_8-14-C5-X₈-C6
	Coleoptera	34	C1-X_23-44-C2-X₃-C3-X_36-43-C4-X_8-12-C5-X₈-C6
		135	C1-X_21-68-C2-X₃-C3-X_21-46-C4-X_8-28-C5-X_8-9-C6
	Diptera	41	C1-X_20-58-C2-X₃-C3-X_55-76-C4-X₉-C5-X₈-C6-X_10-11-C7-X_7-11-C8
	Hemiptera	34	C1-X_22-32-C2-X₃-C3-X_36-46-C4-X_8-14-C5-X₈-C6
	Hymenoptera	254	C1-X_23-35-C2-X₃-C3-X_27-45-C4-X_7-14-C5-X₈-C6
	Orthoptera	4	C1-X_26-27-C2-X₃-C3-X_35-41-C4-X_8-12-C5-X₈-C6
CSP	Coleoptera	26	C1-X_6-8-C2-X₁₈-C3-X₂-C4
	Diptera	23	C1-X_6-8-C2-X₁₈-C3-X₂-C4
	Hemiptera	34	C1-X_5-6-C2-X_18-19-C3-X₂-C4
	Hymenoptera	31	C1-X_6-8-C2-X_18-19-C3-X₂-C4
	Lepidoptera	87	C1-X₆-C2-X₁₈-C3-X₂-C4
	Orthoptera	29	C1-X_6-8-C2-X_18-19-C3-X₂-C4

X: Any amino acid. The C-pattern in Diptera includes two types (typical 6-C and atypical 8-C patterns), which are listed separately. The accession numbers of OBPs and CSPs used in this analysis were listed in Additional File 6.