“3 The … antagonists, suramin (1 × 10−6 M) and pyridoxal‐5‐phosphate‐6‐azophenyl‐2′,4′‐disulphonic … (PPADS) (1 × 10−5 M), completely blocked the facilitatory effect of ATP on glycine release (102·0 ± 11·2 % and 99·3 ± 16·2 %, …= 6, respectively) without altering the current amplitude distributions.”