Table 1.

Release parameters for the calyx of Held

	Young Adult Calyx	Neonate Calyx
PR	∼0.2#	∼0.1#
N40	N < NMAX	N = NMAX
EGTA40	20% block	55% block
N (EGTA)40	—	1 NMAX

^#see text

P_R, SV release probablity

N, CaV-titration test exponent

EGTA, Inhibition of release by 10 mM EGTA

N (EGTA), CaV-titration exponent with 10 mM EGTA