Cytochrome C

We have been using SIGMA Cytochrome C (product number C8266) from horse
heart, on our frozen sections of muscle bxs for years and have been notified
it has been discontinued. Sigma suggest another product but it is a type 3
Cytochrome C . The method specifies type 2. Does it make any difference? Can
you help and which product do you use?

Bob Quilty
Dept of Neuropathology
Frenchay Hospital
Bristol UK

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