Non-charged polar side chains

Serine; Ser; S

Threonine; Thr; T

Asparagine; Asn; N

Glutamine; Gln; Q

Serine and threonine Features

what group do they have on their side chain

that group makes them what.. forms what.. with

this group can be …. by adding ..

what is this called

have an –OH (hydroxyl group) in their side chains.

–OH makes them polar — it can form hydrogen bonds with water or other molecules.

–OH group can also be modified by adding a phosphate group

This process is called phosphorylation. secondary modification in proteins

Asparagine (Asn) and Glutamine (Gln)

their side chains have what 2:

what do these groups form and with what

• Their side chains each have two parts:

  • a carbonyl group (C=O)

  • an amide group (–NH₂)

• These groups can both form hydrogen bonds — with water or with other parts of the protein.

Cysteine; Cys; C

Cysteine; Cys; C features

what group does it have attached

where does it have an important role what does it do

explain what happens to 2 csysten bond tog

Has sulffhydryl,  thiol group 

important role in enzymes active sites. helps grab or release molecules during reaction

when 2 cysteine molecules come close together the Sh group join and form disulfide bond 

this allows bond linkong of diff parts of the protien