Characterization of the AMP-activated protein kinase kinase from rat liver and identification of threonine 172 as the major site at which it phosphorylates AMP-activated protein kinase - Hawley, S A; Davison, M; Woods, A; Davies, S P; Beri, R K; Carling, D; Hardie, D G (J Biol Chem, 1996)