Enterokinase Deficiency, also known as enteropeptidase deficiency, is related to diarrhea and arrhythmogenic right ventricular cardiomyopathy. An important gene associated with Enterokinase Deficiency is TMPRSS15 (Transmembrane Serine Protease 15), and among its related pathways/superpathways is Cobalamin (Cbl, vitamin B12) transport and metabolism. Affiliated tissues include small intestine, and related phenotypes are failure to thrive and diarrhea