[allmendream]

A cytochrome C protein could have any number of billions of variations, of which only some few thousand are actually used, and of those that are used, they all seem amazingly similar or divergent depending upon the relatedness of the two species.

There is no reason a “chicken” cytochrome C wouldn't work just as well in a chimpanzee. There is nothing particularly ‘chicken-ish’ about the differences; both perform the same job in both species.

Yet for some reason a chimp has a “human” cytochrome C protein, and the east asian jungle fowl has a “chicken” cytochrome C. A tiger and a lion have a different cytochrome C protein than a bear, but for some reason a tiger and lion have essentially the same cytochrome c protein as each other.

So it isn't just that there is an amazing amount of variations that could perform a cytochrome c function, it is that so few combinations are actually used, and that they form the same pattern of evolutionary similarity and divergence that we observe when comparing DNA sequences between species.

[AndrewC]

So it isn't just that there is an amazing amount of variations that could perform a cytochrome c function, it is that so few combinations are actually used, and that they form the same pattern of evolutionary similarity and divergence that we observe when comparing DNA sequences between species.

I already allowed for 10⁶⁷ variants. Of course then there would be many. But I also stated that given a cytochrome C, you could easily vary it into the other forms. The hard part is explaining where the first cytochrome C came from(without using a just so story).