So why rewrite cytochrome C for yeast when any of these other ones will work fine? Not only that, but why rewrite cytochrome C sequences so that they produce the same nested hierarchy that is formed when comparing morphology? How does that make sense from a design perspective? Why would you rewrite cytochrome C to make it look like evolution occurred?
Cytochrome C is used by almost all organisms. I would say that several other proteins/enzymes are almost universal. If every little biochemical reaction that takes place in a cell requires transcription and translation, an enormous amount of dna would be needed and would likely be unable to be stored and utilized in an efficient manner if every biochemical reaction corresponded to a single exact sequence of DNA. It would be much more effective , for example, if you designed some of these enzymes/proteins to function the same under numerous different amino acid sequences. Doing so would allow you to use the corresponding gene for purposes other than transcribing the RNA necessary for that particular enzyme/protein. That same gene could be transcribed with other genes, and then spliced thousands of different ways to produce thousands of different miRNAs.
The tuna, pidgeon, horse, drosophila fly, rat and yeast all have different biochemical pathways from each other, and yet all of these pathways use cytochrome C at some time or another. Why not design cytochrome C in such a way that it can perform the same function in a myriad of amino acid sequences? If every animal listed above had a cytochrome C protein that would only function with a specific amino acid sequence, the corresponding gene would likely only produce cytochrome C, and be less likely to be used for other regulatory functions. This would be because you would not be able to put other sequences in it that could serve other functions. If you did, you would destroy the function the gene was mainly designed for.
To summarize: cytochrome C from one organism fits in to the cellular machinery of many other organisms in order to cut down on DNA storage space. One to one correspondence of gene to protein product is wasteful and inefficient.