The commitment of a cell to a pancreatic A cell and its capacity to differentiate into a pancreatic A cell. A pancreatic A cell is a cell in the pancreas that secretes glucagon.
A complex, normally consisting of a catalytic and a regulatory subunit, which catalyzes the removal of a phosphate group from a serine or threonine residue of a protein.
OBSOLETE. A process in which a protein is transported to, or maintained in, a location within a photoreceptor outer segment, which is a portion of a modified sensory cilium.