PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8397354-1 1993 Intracellular calcium levels were measured by ratio imaging of Fura-2-injected CA1 pyramidal neurons during repetitive electrical stimulation of the Schaffer collaterals in rat hippocampal slices. Fura-2 63-69 carbonic anhydrase 1 Rattus norvegicus 79-82