Protein evolution describes the changes over time in the shape, function, and composition of protein. Through quantitative analysis and experimentation, scientists have strived hard to understand the rate and reasons of protein evolution. With the amino acid sequences of cytochrome c and hemoglobin from multiple species, scientists were able to obtain estimations of protein evolution rates. It has been shown that the rates were different among proteins. Each protein has its own rate, and the rate is constant across phylogenies. For example, hemoglobin evolves at a different rate as cytochrome c, but hemoglobins from different species (such as humans, mice, etc.) do have comparable rates of evolution. Not all areas within a protein mutate at the same rate; functionally important regions mutate more slowly and amino acid substitutions involving similar amino acids occur more often than dissimilar substitutions. Overall, the level of polymorphisms in proteins seems to be fairly constant. Several species (such as humans, mice, and fruit flies) have similar levels of protein polymorphism. Now, bioinformaticians at Creative Proteomics are proud to tell you we are open to help you with Protein Evolution Analysis Service!
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