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.
Protein powders are no substitute for eating well, but this one can offer an occasional hand with nutrition. Pea protein is rich in amino acids and is easy to digest. This variety by Alive! contains a substantial 15 grams of protein per scoop, plus a multivitaminâs worth of nutrients.