The present review was dedicated to laccase-the enzyme, belonging to t
he group of multinuclear copper, containing so called ''blue'' oxidase
s. The molecular structure, metals content, substrate specificity, and
other physicochemical properties were described in this article. The
authors considered the mechanism of enzymatic action and electrocataly
tic oxygen reduction catalyzed by laccase in details. The data of lacc
ase application in organic synthesis, biosensors, and immunoenzyme ass
ay were presented.