The Mnemonic for Glucogenic/Ketogenic amino acids is PITT; Phe, Ile, Trp, and Tyr.........Lippincott's biochem and Falcon/Becker include tyrosine instead of threonine. This makes sense though. On the Lippincott's book, Thr enters the Kreb's cycle through Pyruvate pathway and through Succinyl-CoA, which are both classified as glucogenic. While Tyr, through Homogensitate pathway produces Acetoacetate ( Ketogenic ) and Fumarate ( glucogenic ) .
My question is why is the FA mentioning Thr instead of Tyr? This is even in the 2010 edition! Please chime in and correct me if I've missed something