forensic pathology. noun. a branch of medicine used for legal purposes and concerned with determining cause of death, examination of injuries due to crime and negligence, and examination of tissue samples relevant to crimes; also called forensic science. Examples from the Web for forensic pathology.
There are basically three major classifications for amino acids (1) those with nonpolar R group, (2) those with uncharged polar R groups, and (3) those with charged polar R group. The table below shows us all 20 amino acids with their codes.
1 They are called variable groups. 2  There are 20 different variable groups --- so there are 20 different amino acids. 3  So what I am trying to say is that the basic structure of all amino acids is the same except for the variable group (R) spot.