Polar uncharged R groups COO COO COO H3NCH Ha H3NCH CH2 CH2

Polar, uncharged R groups COO COO COO H3N--C--H Ha H3N-C-H CH2 CH2 H-C-OH SH OH CH3 Cysteine Threonine Serine COO COO H3N-C-H H3N-C-H CH2 CH CH2 N o Asparagine Glutamine

Solution

Serine has no charge is neutral i.e pH 7 Threonine has no charge; neutral Cysteine has no charge; Neutral Asparaginr has no charge; Neutral Glutamine Neutral no; charge