For graded release the quenching ratio inside the vesicles changes due to the efflux of DPX (assuming that DPX and HPTS have a similar probability to be released from the vesicle).
Further, these patches also afforded the best graded release of DLX with the first dose (30%; 30 mg DLX) (signifying the onset of therapeutic action) being released in 2 h and 3 h respectively and nearly complete drug release (equivalent to three doses, i.e., 60 mg DLX) at 24 h.
Addition of 10, 30, 100, or 300 ng of Tat for 15 minutes resulted in the graded release of P-TEFb from the 7SK snRNP (Figure 1A).
In the case of graded release, assuming there is no preferential release of HPTS over DPX, the ratio Qin depends on the fraction of escaped solute, since this causes the DPX concentration to drop.
The assay tries to discern two different scenarios: If 50% content release from vesicles is observed is this caused by half of the vesicles releasing all their content (all-or-none mechanism) or by all vesicles releasing half of their content (graded release).
Transmission at this synapse is mediated by graded release of neurotransmitter, whereby release varies with the strength of depolarization (Liu et al., 2009).
