Table 1. Biacore assay results of binding affinity between recombinant human proteasome β1 subunit and fangchinoline or tetrandrine.

Compound	Association (k a) (M-1S-1)	Dissociation (k d) (S-1)	Equilibrium dissociation (K D) (μM)
fangchinoline	7.55×103	0.0353	4.68
tetrandrine	2.89×103	0.0162	5.61