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1

As this question is a first post it is probably just a basic question about protein synthesis, which @Sean Johnson has answered adequately. However I’m not quite sure. And as I used to work in protein synthesis (but am a rather out of touch now) I decided to look at the recent literature a little to address some more esoteric or obscure questions it raised ...


2

Whether or not there are multiple start and stop codons depends on what you mean by "start codon" and "stop codon". The start codon has the sequence "AUG", and the stop codon has the sequence "UAG", "UAA", or "UGA". Both the pre-mRNA and the mature-mRNA can, and usually do, contain multiple instances of all of these sequences. However, only one "AUG" ...


3

Is there evidence of selection against long proteins and long genes? I am not aware of any such evidence and cursory googling did not reveal studies that researched a correlation between gene selection and gene size. However, the larger a gene, the larger the probability of a deleterious mutation within said gene so I expect that there is some limit to ...



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