Nucleotide sequences of exon 4/Intron 4 and Intron 4/exon 5 boundaries. Nucleotide sequences obtained at the intron/exon boundaries of both cloned RHCE and RHD genes are displayed. Exonic sequences are shown in uppercase, intronic sequences in lowercase. The last nucleotide of exon 4 and the first of exon 5 are numbered. The numbering corresponds to the Rh cE and D cDNAs with nucleotide 1 being the first base of the ATG triplet. A representative sequence electropherogram generated during sequence analysis of these regions is displayed in this figure.