Table 2.

Percentage (mean ± S.D.) of E. coli PHL644 pSTB7 cells that were alive determined using flow cytometry during biotransformations performed with planktonic cells or biofilms

Reaction conditions	Cell type and time of sampling
	Planktonic	Planktonic	Biofilm	Biofilm
	2 hours	24 hours	2 hours	24 hours
Reaction Buffer, 5% DMSO	99.52 ± 0.14	99.32 ± 0.40	95.73 ± 2.98	92.34 ± 0.10
Reaction Buffer, 5% DMSO, 2 mM 5-fluoroindole	99.38 ± 0.60	99.24 ± 0.80	96.44 ± 1.51	90.73 ± 0.35
Reaction Buffer, 5% DMSO, 2 mM 5-chloroindole	99.27 ± 0.33	99.33 ± 0.20	95.98 ± 2.64	91.69 ± 3.09
Reaction Buffer, 5% DMSO, 2 mM 5-bromoindole	99.50 ± 0.18	99.33 ± 0.20	96.15 ± 1.94	91.17 ± 2.19