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.
Snow peas contain galacto-oligosaccharides (GOS), a chain of sugars that are hard to digest and end up feeding gut bacteria, a cause of bloating. Snow peas also contain fructans and are high in polyols, which are often only partially absorbed by the body, another cause of stomach problems.