Figure 5.
Two functional odor receptors from one alternatively spliced gene. (A) The Or46a genomic locus and the two alternatively spliced mRNA species detected in the maxillary palp. The red and green bars indicate probes used in panel (C). (B) Amino acid sequence alignment of the three predicted Or46a proteins. (C) Maxillary palps co-stained with RNA probes against Or46aA and Or46aB. (D) Tightly linked antennal receptor genes. Genomic organization and mRNAs detected in the antenna are indicated. The 5' end of the transcript encoding Or22b has been found to lie 5' to the second intron of Or22a but has not been identified precisely; the diagram shows the 5' end predicted by analogy to the shorter mRNA.