3 Carboxylases that require A, B, and C (i.e. ATP, Biotin and CO2)

Pyruvate carboxylase in gluconeogenesis

Acetyl CoA carboxylase in fatty acid synthesis

Proprionyl-CoA carboxylase in propionate metabolism

The other carboxylase that does not require Biotin = Vit. K dependent Gamma glutamyl carboxylase in coagulation