Figure 1. Construction, expression and purification of the recombinant NHases.
(a) Genetic organization for the construction of a set of plasmids. (b) SDS-PAGE of a cell-free extract of each transformant. 1, marker; 2, wild-type NHase; 3, NHase-(BA); 4, NHase-(BA)P14K; 5, NHase-(BAP14K). (c) SDS-PAGE of the purified enzymes. 1, marker; 2, wild-type NHase; 3, NHase-(BA); 4, NHase-(BA)P14K; 5, NHase-(BAP14K).