[tex]NADP{{H}_{2}}[/tex] is required for the transformation of oxaloacetic acid into malic acid.
Malic acid is sour and acidic. This helps to clear away dead skin cells when applied to the skin.
The conversion of oxaloacetic acid into malic acid takes place in [tex]C_4[/tex]plants through the [tex]C_4[/tex] cycle by the process of photosynthesis.
Carboxylation of pyruvate produces oxaloacetate (OAA). This is an energy-requiring reaction that uses adenosine triphosphate (ATP).
Hence, [tex]NADP{{H}_{2}}[/tex] is required for the transformation of oxaloacetic acid into malic acid.
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