<Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <P> Janus Green B is a basic dye and vital stain used in histology . It is also used to stain mitochondria supravitally, as was introduced by Leonor Michaelis in 1900 . </P> <P> The indicator Janus Green B changes colour according to the amount of oxygen present . When oxygen is present, the indicator oxidizes to a blue colour . In the absence of oxygen, the indicator is reduced and changes to a pink colour . </P>

What is the function of janus green stain in mitochondrial staining
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