PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1491115-5 1992 A hypothetical signal chain is described which suggests the involvement of cytochrome b as an O2 sensor in PO2 chemoreception of the carotid body and the degradation of H2O2 by glutathione to control the K(+)-conductivity of carotid body cells. PO-2 107-110 cytochrome b, mitochondrial Rattus norvegicus 75-87