>why mRNA? Why not skip the middle man and go straight for proteins? There is no polypeptide decoding machinery in the cell, proteins are functional chains wit

>why mRNA? Why not skip the middle man and go straight for proteins? There is no polypeptide decoding machinery in the cell, proteins are functional chains with a lot of structure. However cells do use external protein structure to communicate with neighboring cells (via protein-protein interactions) now we know they can send messages via RNA as well.