Do branched chain keto amino acids regulate their own metabolism?

e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521

Structure	Name/CAS No.	Molecular Formula	Articles
	2-KETOHEXANOIC ACID SODIUM SALT CAS:13022-85-0	C₆H₉NaO₃