CoA and Acyl carrier protein (ACP) are similar in that
Both are present in mitochondria
Both contain pantothenic acid
Both are used in fatty acid degradation
Both are required for activation of fatty acids
Acetyl CoA is the combination of acetate or acetic acid (2 carbon unit) with Co-enzyme A. Acyl CoA means acyl group (any fatty acid, C4 to C26 in length) combined with Coenzyme A.Ref: MN Chatterjea Textbook of Medical Biochemistry, 6th edition, page no: 131
Respiratory chain