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.
Enter pea protein, made from yellow split peas, which is showing up in everything from the usual suspects where we once found soy isolateâenergy drinks, bars, and meal-replacement shakesâto the unexpected, including cereals, salad dressings, veggie burgers, pasta, and even popcorn.