Fig. 3From: Identification of protease m1 zinc metalloprotease conferring resistance to deltamethrin by characterization of an AFLP marker in Culex pipiens pallens Expression levels of protease m1 zinc metalloprotease at all development stages. The gene expression level at the female stage in Lab-DS strain was considered to be 1. The figures show the mean ± SD of three independent experiments. *P < 0.05, **P < 0.01 compared with the Lab-DS strainBack to article page