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The Effect of Agitation and Nitrogen Concentration on Lignin Peroxidase (LiP) Isoform Composition During Fermentation of Phanerochaete Chrysosporium

H. Podgornik, A. Podgornik, P. Milavec, A. Perdih

Journal of Biotechnology 88 (2001) 173-176

Convective Interaction Media (CIM®) monolithic columns were applied for the HPLC monitoring of Phanerochaete chrysosporium lignin peroxidase (LiP) isoforms during cultivation. The influence of the agitation mode (circular, elliptic) and rate (130 and 200 rpm), as well as the initial nitrogen concentration (1.6–6 mM) in the growth medium was investigated. Identical rotation rate but different agitation modes resulted in different LiP activities and isoenzyme compositions. On the other hand, at different agitation types and rates, similar LiP activities were obtained at different isoenzyme compositions. Although LiP H2 and LiP H6/H7 were predominant isoenzymes obtained at various cultivation conditions, relative isoenzyme amounts differ considerably when initial nitrogen concentration was changed between 1.6 and 5 mM.

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