Cytochrome Oxidase
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Last updated 11:47 PM on 1/26/25
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5 Terms
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How does test work
The dye replaces oxidase as electron transfer mechanism in aerobic respiration.
2
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Positive test
If oxidase is there, dye will turn purple
3
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Negative test
If no oxidase, colorless
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Dye name
Tetra-methyl-p-phenylenediamine dihydrochloride (Do not memorize just recognize)
5
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Caveats
Interpret quickly
Do not grab colony with metal (false positive)
Stay away from MacConkey/ pigmented colonies
Note 
Flashcards (23)