Mutations in genes that change their pattern of expression (the time and cell type in which the gene product is produced) are thought to be a major factor m the evolution of different organisms. would you expect the same protein to perform the same bio-chemical function (for example, the same enzymatic reaction in two different types of cells-for example, cells in the retina of the eye and muscle cells? would you expect the same protein to function in the same biochemical pathway (for example, bind the same substrate) in eye cells and muscle cells?