PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1182705-8 1975 The relationship of this histidase depression to tumor promotion and not initiation is further indicated by the finding that (a) Tween 60, a structurally unrelated tumor promotor, also produced a decrease in histidase; and (b) the tumor initiator urethan and an initiating dose of 9,10-dimethybenz(a)anthracene showed no effects on histadase activity. Urethane 247-254 histidine ammonia lyase Mus musculus 25-34