Hydroxyl Containing Amino Acids Serine and Threonine

These are polar, very weakly acidic molecules but uncharged at neutral pH. They can form hydrogen bonds and are thus quite soluble. Threonine has an additional chiral centre, but again only l-threonine is found in proteins. Serine is found at the active centre of some enzymes. It is also the usual site of

Figure 3 Peptide bond formation.

attachment for the carbohydrate residues in glycoproteins and for the phosphoryl groups in phosphoproteins.

Breaking Bulimia

Breaking Bulimia

We have all been there: turning to the refrigerator if feeling lonely or bored or indulging in seconds or thirds if strained. But if you suffer from bulimia, the from time to time urge to overeat is more like an obsession.

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