Premium
Intracellular compounds quantification by means of flow cytometry in bacteria: Application to xanthan production by Xanthomonas campestris
Author(s) -
GarcíaOchoa F.,
Santos V. E.,
Alcón A.
Publication year - 1998
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/(sici)1097-0290(19980105)57:1<87::aid-bit11>3.0.co;2-5
Subject(s) - intracellular , xanthomonas campestris , flow cytometry , nucleic acid , bacteria , biological system , chemistry , xanthan gum , biochemistry , chromatography , biology , microbiology and biotechnology , materials science , genetics , rheology , composite material
The use of flow cytometry (FCM) to quantitatively analyze intracellular compounds is studied. FCM is a very useful technique for individual cell studies in microbial systems, and gives access to information which cannot be obtained in any other way. Nevertheless, it provides data in arbitrary units, that is, relative data. This analytical technique could be employed for kinetic modeling of microbial systems and even for internal phenomena analysis, but for this purpose, absolute data—that is concentration of intracellular compounds—must be used. In this work, relative flow cytometry data are transformed into absolute data by means of calibrations employing the same fluorochromes with another technique: spectrofluorymetry. Calibrations of DNA, RNA, and protein intracellular concentrations are presented for the bacteria, Xanthomonas campestris. Other analytical methods, based on biochemical determinations, were also employed to quantify intracellular compounds, but the results obtained are very poor compared with those achieved by means of spectrofluorymetry (SFM). Calibration equations and data obtained by both techniques are given. Evolutions of protein and nucleic acids during Xanthomonas campestris growth and xanthan gum production are shown. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 57: 87–94, 1998.