BIOCH200 Lecture Notes - Side Chain, Chch-Dt, Acid Dissociation Constant
10 Apr 2014
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Function amino acids (con"t) | (january 29, 2014) *these amino acids are reactive due to functional groups: side chains contain an electronegative atom. *it"s side chain consists of a hydrogen atom only therefore, glycine is not a particularly good example of a polar amino acid since it is only weakly polar: the glycine molecule is also small and therefore flexible. *is the only achiral amino acid out of the 20: serine (ser, side chain = -ch2oh. *-oh can be phosphorylated to yield a charged (-) molecule: threonine (thr, = serine h (on side chain) + ch3 = -chch3oh o. This molecule can also be phosphorylated and acts as a h-donor in h-bonds: *has 2 chiral carbons. : at a ph value below the pka value an ionizable group will be: true, tyrosine (tyr, has an aromatic r group with a hydroxyl group (acts as h-donor) attached to it. *because it has a hydroxyl group, it can also be phosphorylated.
