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.
Furthermore, pea shoots and sunflower microgreens are delicious, easy to add to your daily meals and snacks and, due to their incredibly high quality protein content, help to control your blood sugar levels and reduce food cravings.