Extracellular ATP increases cytoplasmic free Ca2+ concentration in clonal insulin-producing RINm5F cells. A mechanism involving direct interaction with both release and refilling of the inositol 1,4,5-trisphosphate-sensitive Ca2+ poolPer Arkhammar, Per‐Olof Berggren, A. HALLBERG et al.|Biochemical Journal|1990Cited by 60