-7 kcal/mol) decrease in free energy (DG) under standard condition is called high energy compound, i.e., DG >- 7 Kcal/mol. For example, ATP liberates 7.3 Kcal/mol on hydrolysis.High energy compounds are: -Phosphate compounds : Nucleotides (ATP Q, GTP, UTP, UDP-glucose), Creatinine phosphate Q, arginine phosphate, 1,3-bisphosphoglycerate, Phosphoenol pyruvate, inorganic pyrophosphate. Carbamoyl phosphate Q, amino acyl adenylate (amino acyl AMP).Sulfur compounds : - CoA derivatives (acetyl CoA Q, Succinyl CoA, fatty acyl CoA, HMG CoA), S-adenosyl methionine (SAM), adenosine phosphosulfate.o A compound which liberates < 7 Kcal/mol on hydrolysis is called low energy compound, i.e., a decrease in free energy' is < 7 Kcal/mol, i.e., DG < -7 Kcal/mol. Low energy compounds are glucose-1-phosphate, fructose-6-phosphate, glucose-6-phosphate, glycerol-3-phosphate, AMP, ADP Q.">