Fe (II)

Co (III)

Zn (II)

Ca (II)

oxidation of glucose to glutamate

conversion of pyruvate to citrate

oxidation of glucose to pyruvate

conversion of glucose to haem.

edible proteins

proteins with specific structure

nitrogen containing carbohydrates

carbohydrates.

$$\alpha $$-carbon of $$\alpha $$-amino acid is asymmetric.

All proteins are found in $$L$$-form

Human body can synthesise all proteins they need.

At pH = 7 both amino and carboxylic groups exist in ionised form.