The ( C ) ce ( s ) haplotype , mainly found in black individuals , contains two altered genes : a hybrid RHD-CE-D ( s ) gene segregated with a ce ( s ) allele of RHCE with two single nucleotide polymorphisms , c. @C > G ( p.Leu@Val ) in exon @ and c. @G > T ( Gly@Cys ) in exon @ .