BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Serine. The primary alcohol group of serine can form esters with phosphoric acid (Figure 3-4) and glycosides with sugars. The phosphorylation and dephosphorylation processes regulate the biochemical activity of many proteins.

Detailed explanation-2: -Serine differs from alanine in that one of the methylenic hydrogens is replaced by a hydroxyl group. Serine is one of two hydroxyl amino acids. Both are commonly considered to by hydrophilic due to the hydrogen bonding capacity of the hydroxyl group.

Detailed explanation-3: -Think of serine as alanine with an OH group attached. Unlike tyrosine, the OH is the majority in this molecule and its polarity is enough to influence the entire group. This makes series polar and very hydrophilic.