Co-enzymic activities of vitamin B6-

It is involved in the process of absorption of amino acids from intestine and in the desulphuration of cystein and homocysteine. It is required for the synthesis of amino levalinic acid which is an important intermediate in the synthesis of porphyrin and hemo nuclei.
It is also especially applied to brain metabolism because it is necessary for the formation of serotonin, amino butyric acid and the catecholamine. It is also concerned with immune response.