For instance, in our body, ribosomes build proteins by beginning at the terminal amino end and ending at the terminal carboxylan. But in the laboratory, we begin building proteins at the terminal carboxyl end and we move backwards towards that terminal amino n. So we build proteins in the opposite direction to how the proteins are built inside ourselves. Now, how does this procedure actually work and how do we build these proteins in a laboratory setting? So in this lecture, we're going to discuss the solid phase method of building proteins in the lab. So what exactly is the major point of the solid phase method? Well, there are two important points.