Now I'm not gonna draw all of this for all of them, but we already know that free amino acids having amino group and a car boxing group, and they're free and ionized able. So they all have an amino group and a car boxing group. And so, as you guys already know, free amino acids all have an end terminal end. So they're free and independent from another one another. And so also noticed that these amino acids here are not linked via peptide bond. But again, it's not going to tell us the order that these amino acids coming So we have no idea veiling comes first or glisten come first. So the composition will tell us that there is a total of six amino acids and it will tell us that there's Onley, one each of veiling Allan e, meth, inning and fennel, Allan E. So we're gonna talk about the composition first and recall that the composition is the number and the types of amino acids. Here is the composition and on the right, what we have is the sequence. And so, in our example below, we're gonna talk about the primary protein structure and how it consists of composition and sequence. But it doesn't include the order that the amino acids coming, and that's where the sequence comes into play because the sequence is the particular or the exact order of amino acid residues, specifically from the n terminal end of a protein to the C terminal end of a protein. And so the composition is really referring to both the number or the quantity and the types of amino acids that are present. And so when biochemist referred to the primary protein structure, they're really referring to both the amino acid composition and the sequence of amino acid residues in a chain. And so all the residue is is an amino acid that has been linked in a poly peptide chain. And so once these free, independent amino acids are actually linked together, they're referred to as amino acid residues. So in our last lesson video, we said that free amino acids that are separate and independent from one another can actually be co violently linked together in a chain via peptide bonds to create ah poly peptide chain. In this video, we're gonna talk about the primary structure of a protein.
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