Myosins are actin-based motor molecules with ATPase activity. Unconventional myosins serve in intracellular movements. Their highly divergent tails are presumed to bind to membranous compartments, which would be moved relative to actin filaments. Plays a role in proper daughter cell budding and separation. Isoform MyoB is cytoplasmic while isoform MyoC is concentrated at the anterior and posterior polar rings of the inner membrane complex. Both isoforms are expressed at higher levels in bradyzoites than in tachyzoites. Isoform MyoC is the predominant isoform in tachyzoites. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Myosin family.