During photorespiration or C2 pathway, the intermediate which is subjected to oxidation, decarboxylation and deamination is

During photorespiration, the amino acid glycine (2 molecules) by the catalytic activity of glycine decarboxylase (a multienzyme complex) is decarboxylated, deaminated (NH4+) and oxidized (removal of H atoms and formation of NADH) to a molecule of amino acid serine.