Schematic representation of novel α ENaC alternatively spliced forms (-c and -d). A) A schematic illustration of the mRNA sequences of α ENaC-c and -d forms. α ENaC-c and -d are small non-coding RNA. α ENaC-c is composed of portions of exon VII, IX and XII, while that of α ENaC-d is formed of a portion of exon XII and an intronic fragment. B) The genomic sequence of α ENaC-c and -d forms. α ENaC-c share the same splicing site (CCTGGG) with α ENaC-a and -b spliced forms, which is located within exon VII. α ENaC-c and -d are made up of 59 and 99 bases respectively.