Table 2: Number variation of the members of each BTB protein subfamily in the silkworm and other insects.

SubfamilySilkworm
(Lepidoptera)
Fruit fly
(Diptera)
Honey bee (Hymenoptera)Red flour beetle (Coleoptera)Monarch butterfly (Lepidoptera)

BTB only228121113
BTB-ANK22222
BTB-BACK54254
BTB-BACK-PHR212
BTB-BACK-Kelch677106
BTB-Kelch1111
BTB-ZF (C2H2)1211141515
BTB-ZF (FLYWCH)32115
BTB-HTH27542
MATH-BTB11111
RhoBTB111
Others141

Total5644465553

Note: — represents no identification.