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Table 1 Dye Screening for MP estimation

From: Single cell analysis applied to antibody fragment production with Bacillus megaterium: development of advanced physiology and bioprocess state estimation tools

Dye

Increasing fluorescence according to cell status

Concentration range (μM)

Incubation time range (min)

Maximum difference to depolarized cells with CCCP

Influence on

    

Concentration (μM)

Incubation time t (min)

SS (% ± SD)

EV (% ± SD)

DiOC 2 (3)

Red (675 nm)/green (525 nm) ratio, polarized

4-80

0-43

14

5 < t < 27

-18 (±8)

-19 (±5)

DiOC 6 (3)

Green (525 nm), polarized

0.015-0.4

0-36

0.365

5 < t <28

-14 (±6)

-54 (±5)

DiBAC 4 (3)

Green (675 nm), depolarized

0.02-3

0-43

2.1

2 < t <4

-47 (±8)

-84 (±8)

  1. Overview of different dyes used to estimate MP of B. megaterium cells, optimized concentration ranges and incubation times with their particular effect on Side Scatter (SS) and Electronic Volume (EV) measurements.