Calcineurin expression based on immunodetection of CNB. Illustrated is the immunoblot of 15 μg protein extracted from the Δcnb1 yeast disruptant YP9 (Δcnb1), wild-type yeast DBY746 (w.t.), or DBY746 transformed with plasmid pCAtrB for overproduction of CNB (pCAtrB), 0.5 μg purified recombinant CNB protein (CNBp), and 45 μg protein isolated from leaves of T2 plants homozygous for npt-II (A9hom, T7hom), the complementary azygous (A9azy, T7azy), or homozygous T2 plants transformed with an empty plasmid (vector). Proteins were separated on a 15% SDS-polyacrylamide gel and reacted with chicken anti-CNB antibodies.