Can Proteins Enter The Krebs Cycle?

Can Proteins Enter The Krebs Cycle? Figure: Connection of Amino Acids to Glucose Metabolism Pathways: The carbon skeletons of certain amino acids (indicated in boxes) are derived from proteins and can feed into pyruvate, acetyl CoA, and the citric acid cycle. Can amino acids enter TCA cycle directly? Hence, all amino acids through transamination/deamination reactions