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.
Green peas are a very good source of vitamin K, manganese, dietary fiber, vitamin B1, copper, vitamin C, phosphorus, and folate. They are also a good source of vitamin B6, niacin, vitamin B2, molybdenum, zinc, protein, magnesium, iron, potassium, and choline. For an in-depth nutritional profile click here: Green peas.