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From Bioblast

high-resolution terminology - matching measurements at high-resolution



p50 is the oxygen partial pressure at which (a) respiratory flux is 50% of maximum oxygen flux, Jmax, at saturating oxygen levels. The oxygen affinity is indirectly proportional to the p50. The p50 depends on metabolic state and rate. (b) p50 is the oxygen partial pressure at which oxygen binding (on myoglobin, haemoglobin) is 50%, or desaturation is 50%.

Abbreviation: p50

Reference: Gnaiger 1998 J Exp Biol

MitoPedia concepts: MiP concept 

MitoPedia methods: Respirometry, Spectrophotometry 

MitoPedia topics: Substrate and metabolite