The student plans to use an antibody to the human cytochrome C protein in an ELISA test on cytochrome C samples from these four organisms. What should she use as a positive control

A detector that can mark the protein that goes against cytochrome c

Explanation:

You could use a protein marker or even a chemical compound that permeates the amino acids that make up said protein in order to determine if it is positive or not.

your answer is "the 1950's"