Nucleotide sequences of cloned RHCE and RHD gene Intron 4. The complete nucleotide sequences of the RHCE and RHD gene intron 4 are displayed. The sequences are derived from cloned PCR products, the sequences of exon 4 and 5 are displayed in uppercase. Intron 4 sequence is displayed as lowercase, and the first nucleotide of the intron is numbered as position 1. The RHCE intron extends to 1077 nts, while the RHD intron to 426 nts. Sequence differences between the two genes are denoted by a cross on the shadow sequence. The two nucleotide sequences have been submitted to Genbank/EMBL databases and have the following accession numbers: Intron 4 RHCE:Y10604, intron 4 RHD:Y10605.