Mutants of glucokinase cause hypoglycaemia- and hyperglycaemia syndromes and their analysis illuminates fundamental quantitative concepts of glucose homeostasis. - Davis,EA.; Cuesta-Munoz,A.; Raoul,M.; Buettger,C.; Sweet,I.; Moates,M.; Magnuson,MA.; Matschinsky,FM. (Diabetologia, 1999)