Fig. 1.
(A) Schematic of FBP and its bioluminescence reaction. (B) SDS/PAGE of biotinylated CLuc (lane 1) and FBP (lane 2). (C) Bioluminescence spectra of FBP measured in different pH buffer solutions containing 0.1 M NaCl. Curves all superimpose. (D) Bioluminescence spectrum of FBP in blood. (E) Relative light intensity of FBP or CLuc in buffer. (F) Relative light intensity of FBP or CLuc in blood.