Angiotensin converting enzyme (ACE) has multiple effects both as the e
nzyme which cleaves angiotensin II from angiotensin I and as that whic
h breaks down bradykinin. The present study examines ACE mRNA and prot
ein expression in the rat kidney during development. Changes in distri
bution and expression during development are consistent with suggestio
ns that the renin angiotensin system is important in growth modulation
, vascular development and regulation, and protein reabsorption.