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Fig. 1. Expression of capa receptor in dipteran tubules. RT-PCR of tubule cDNA
templates with primers designed to the capa receptor gene from D.
melanogaster (A, lane 1; product size, 1448 bp), A. aegypti (A,
lane 3), A. stephensi (B, lane 1; product size, 250 bp), A.
gambiae (B, lane 3; product size, 250 bp). Controls were performed using
no cDNA template: D. melanogaster (A, lane 2), A. aegypti
(A, lane 4), A. stephensi (B, lane 2), A. gambiae (B, lane
4). L=1 kb ladder. No PCR product was observed with A. aegypti cDNA
template. In all cases, products obtained were of the sizes predicted for cDNA
templates. Identical PCR products were obtained from both A. gambiae
and A. stephensi. Very few A. gambiae were available for
study; however, given the documented expression of the putative capa receptor
in both species, the more abundant A. stephensi was used for all
subsequent experiments.