CHY 204 Chapter Notes - Chapter 3: Titration Curve, Carboxylic Acid, Acid Dissociation Constant

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All proteins are constructed from the same 20 aa that are covalently linked in characteristic linear sequences b/c of their side chains, each has distinct chemical properties; think of the 20 aa as the alphabet for pro structure. From these building blocks, various combinations give rise to enzymes, hormones, antibodies, transporters, muscle fibers, lens pro of the eye, feathers, spider webs, rhinoceros horn, milk pro, antibiotics, etc. Enzymes are the most varied & specialized; virtually all cellular rxns are catalyzed by enzymes. Pro are polymers of aa w/ each aa residue (residue means the loss of elements of h2o when an aa acid is joined to another) joined to its neighbour by a specific type of covalent bond. First aa discovered was aspargine (found in asparagus) & the last was threonine; names are derived from where the aa were first isolate, eg. glutamate in wheat gluten, tyrosine in cheese & glycine due to sweet taste.

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