> No, amino acids are bind to tRNA by special proteins that have handiness and can easily distinguish the L and R version. Most proteins can only operate on one

> No, amino acids are bind to tRNA by special proteins that have handiness and can easily distinguish the L and R version. Most proteins can only operate on one handiness of the target molecule. Ah, neat. That was the step where I worried about coding being infeasible, too, coding for R amino acids wouldn't do any good if you couldn't distinguish them. I did know there was plenty of room in the encoding scheme.