PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24213040-3 1989 A linear relationship was established between pHi and the 490/450 fluorescence ratio of BCECF-AM over the pH range 6.0 to 8.0 using the ionophore nigericin. Nigericin 146-155 glucose-6-phosphate isomerase Homo sapiens 46-49