PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1981788-5 1990 Compared to naive PC12 cells, K-ras infected PC12 cells had (a) higher activities of acetylcholinesterase and choline acetyltransferase, two enzymes involved in acetylcholine metabolism; (b) enhanced activity of tyrosine hydroxylase, the rate-limiting enzyme in catecholamine biosynthesis; (c) a higher, evoked norepinephrine release; and (d) similar levels of sodium-dependent uptake of both choline and norepinephrine. Catecholamines 262-275 KRAS proto-oncogene, GTPase Rattus norvegicus 30-35 1981788-6 1990 Although the total content of catecholamines in K-ras-differentiated PC12 cells was less than that of naive cells, both norepinephrine and dopamine were present in substantial amounts and norepinephrine was released after stimulation. Catecholamines 30-44 KRAS proto-oncogene, GTPase Rattus norvegicus 48-53