nucleotide sequences of exon-intron junctions and 5 ' and 3 ' flanking sequences revealed that the gpa and gpb genes consist of 7 and 5 exons , respectively , and both genes have greater than 95 % identical sequence from the 5 ' flanking region to the region approximately 1 kilobase downstream from the exon encoding the transmembrane regions .
C0017955
gpa
C1519623
transmembrane regions