Nucleotide sequence of the alternatively spliced A. gambiae class I GST gene, aggst1α. Primers designed from the sequence of the An. gambiae S2La genomic clone, Ag_B1, were used to amplify the equivalent region of the genome from the DDT-resistant ZAN/U strain. The derived amino acid sequence of the five coding exons is shown below the nucleotide sequence. The location of the primers used to detect the splice variants are marked by arrows, putative polyadenylation sites are underscored, and the sites of addition of two of the poly(A) tails are marked with #.