Carboxyl groups have an electronegative oxygen atom double bonded to a carbon atom. This carbon-oxygen bond is very polar and the fact that its a double bond increases the polarity of the bond.
PEA agar, also referred to as Phenylethyl Alcohol Agar is a medium  used by microbiologists to grow microorganisms. The ingredient that  supplies nitrogen is casein. Making the world better, one answer at a time.
Pea Fiber is a vegetable fiber manufactured through extraction from pea, available as Cream to slightly greenish Fine powder. Pea Fiber is widely used as nutrition supplements. It is widely accepted as safe food additive in many countries.