Figure 5. Alignment of the derived protein sequences of pig, human, mouse, and rat enamelin. The number of the last amino acid in each row is indicated on the right. Amino acid residues at the amino- or carboxyl-termini of known porcine enamelin cleavage products are labeled above the pig sequence. Potentially modified amino acids are in bold. An asterisk indicates an amino acid that is known to be modified in pig enamelin. Known polymorphisms in the human enamelin protein are underlined: (Arg/Gln)286, (Ile/Thr)648, (Arg/Gln)763, and (Gly/Asp)948.