(1) fructose-6P+ATP - PFKFB* -> fructose-2,6P2+ADP (2) fructose-2,6P2 - TIGAR* - PFKFB* -> fructose-6P (3) PFKFB1 -> PFKFB* (4) PFKFB2|pho -> PFKFB* (5) PFKFB3|pho -> PFKFB* (6) PFKFB4 -> PFKFB*