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Abstract Esterases produced by different bacterial species were separated by conventional electrophoresis (CE) in polyacrylamide agarose gel and by thin‐layer isoelectric focusing (IEF). Although CE revealed the greatest number of esterases and was preferable for their identification by specific hydrolytic activities, the two techniques appeared to be complementary in their resolving power for detection of electrophoretic variants. Consequently, by establishing a direct correspondence between homologous esterase bands resolved by CE and IEF, we have proposed a two‐dimensional electrophoretic profile (2‐DEP) which considerably refined the degree of esterase polymorphism and improved the enzymic differentiation between and within bacterial species.
Goullet et al. (Tue,) studied this question.