Table 2.

Comparison of GST gene numbers of various insect species*

Insect species	Delta	Epsilon	Omega	Sigma	Theta	Zeta	Unclassified	Total
P. xylostella	5	5	5	2	1	2	2	22
B. mori	4	8	4	2	1	2	2	23
C. quinquefasciatus	17	10	1	2	6	0	3	39
D. melanogaster	11	14	5	1	4	2	0	37
A. gambiae	12	8	1	1	2	1	3	28
A. aegypti	8	8	1	1	4	1	3	27
T. castaneum	3	19	3	7	1	1	2	36
N. vitripennis	5	0	2	8	3	1	0	19
A. mellifera	1	0	1	4	1	1	0	8
A. pisum	9	0	2	5	2	0	6	24
P. humanus	4	0	1	4	1	1	0	11

*Data were from cited literature: Friedman (2011) [30], Oakeshott et al. (2010) [31], Yu et al. (2008) [28], Ding et al.(2003) [29] and Nair et al.(2011) [32].