in the interval were not found on this list of correlates, but include genes belonging to voltage-gated sodium (e.g. Scn2b and Scn4b, Tail Clip Male Positional candidates on Chr 4) or calcium channels class of genes (Bear et al. 2009), cholinergic receptors class of genes (e.g. Chrm4, Tail Clip Male Positional candidates on Chr 2) (Dussor et al. 2004) and calcitonin receptor-like genes or calcitonin gene-related peptides (e.g. Calcrl, Tail Clip Male Positional candidates on Chr 2) (Li et al. 2008), all of which have substantial literature support for involvement in nociception.