PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11274162-7 2001 Transport by AVT1 and AVT6 requires ATP for function and is abolished in the presence of nigericin, indicating that the same pH gradient can drive amino acid transport in opposing directions. Nigericin 89-98 aspartate/glutamate transporter Saccharomyces cerevisiae S288C 22-26