TABLE 2.

Peptide affinity of TAP

TAP complex	Filter binding KD	Fluorescence quenching KD
	μm	nm
Membranes	0.6 ± 0.2	12.0 ± 1.0a
Solubilized	1.4 ± 0.4	NDb
Purified	1.3 ± 0.3	30.0 ± 5.0
Reconstituted	0.3 ± 0.1	ND

^a Taken from Neumann and Tampé (11).

^b ND, not determined.