Peroxidases are haem-containing enzymes which catalyse the reduction of hydrogen peroxide by different organic substrates. Plant, fungal and bacterial peroxidases are evolutionarily related and constitute the plant peroxidase superfamily, which can be divided into three structural classes. Class I, of prokaryotic origin, includes cytochrome c peroxidase (CCP); class I1 contains secretory fungal...

Sexual development in the mushroom Coprinus cinereus is under the control of the A and B mating-type loci, both of which must be different for a compatible, dikaryotic mycelium to form between two parents. The A genes, encoding proteins with homeodomain motifs, regulate conjugate division of the two nuclei from each mating partner and promote the formation of clamp connections. The latter are h...