PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6257420-5 1981 Using BK as substrate, we found that placental and fetal ACE activities were reflected by 45% (SD = 10) and 24% (SD = 7) clearances, respectively, at a perfusate PO2 of 29 mm Hg. PO-2 162-165 LOW QUALITY PROTEIN: angiotensin-converting enzyme Cavia porcellus 57-60