volume 250, issue 3, PC374-C383 1986
DOI: 10.1152/ajpcell.1986.250.3.c374
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Abstract: The O2 dependence of respiratory functions was studied in suspensions of isolated rat cardiac myocytes. Direct optical spectroscopy of the oxidation of cytochromes and oxygenation of Mb showed that cytochrome alpha 3 oxidation measured at 445-460 nm parallels Mb oxygenation; half-maximal values were at 8.0 and 8.5 microM, respectively. Thus there appears to be a close functional relationship between these components in the cells. The values are very high relative to comparable values for cytochrome alpha 3 oxi…

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