PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11289303-2 2001 For assimilation of nitrate (and nitrite) there are two types of uptake system known: ABC transporters that are driven by ATP hydrolysis, and secondary transporters reliant on a proton motive force. Nitrates 20-27 ATP binding cassette subfamily B member 6 (Langereis blood group) Homo sapiens 86-89