FIG. 2.

Fluorescent emission spectra of FpvA in P. aeruginosa wild-type and tat mutant. Outer membrane fractions of P. aeruginosa PAK (▵) and PAKΔtatC (○) were dissolved in 50 mM Tris-HCl at pH 8.0. Excitation was at 290 nm, and fluorescence was recorded at 447 nm. a.u., arbitrary units.