PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
16660571-6	1978	Because the specific activity of nitrate reductase was severalfold lower than the other enzymes involved in nitrate assimilation, nitrate reduction is indicated as the rate-limiting step in situ.	Nitrates	108-115	nitrate reductase [NADH] 1	Zea mays	33-50