OBJECTIVE:A silencer region (I-allele) within intron 16 of the gene for the regulator of vascular perfusion. angiotensin-converting enzyme (ACE). is implicated in phenotypic variation of aerobic fitness and the development of type II diabetes. We hypothesised that the reportedly lower aerobic performance in non-carriers compared to carriers of the ACE I-allele. https://www.roneverhart.com/Okapi-Wildlife-Toy-Figure/