Calcitonin gene-related peptide (CGRP), a 37 amino acid peptide implicated in migraine headaches, has been shown to affect vascular tone, inflammatory processes and pain transmission. Another synonym for calcitonin gene is calcitonin gene-related peptide-alpha (CGRP-alpha), which is a molecular variant that is more potent than the beta form. In addition, another synonym for calcitonin gene is calcitonin mRNA (messenger ribonucleic acid), which is the molecule that carries the genetic code for producing calcitonin protein. Finally, calcitonin gene-related polypeptide (CGRP-P) is another synonym for calcitonin gene, which refers to the precursor molecule that is processed to form the active CGRP peptide.