Jet

Biology

26 April, 19:56

During the sequencing of the chimpanzee genomes, a gene (cmah) was identified that completely lost an exon in human when compared to chimpanzee. scientists have found no evidence of the protein or its enzyme function in any human tissue although the protein is fully functional in chimpanzee. the normal function of the gene is to add modified sialic residues to proteins on the cell membrane. the loss of the exon is found in all humans that have been examined, but the gene is conserved in all other primates and mammals