RT-PCR confirms the ATP11B gene is alternatively spliced in rabbit endometrium. Lanes 1 and 3, Lambda DNA/EcoR I + Hind III markers (bp). Lane 2, the single. 939-bp product from Ishikawa cells. Lane 4, two populations of ATP11B amplicons from a single competitive PCR reaction, i.e. the 939-bp, full-length product whose sequence matches that of the human, and the 741-bp, abbreviated (RFBP) product resulting from the exon-skip event.