Hence it is called a variable reluctance stepper motor. In this motor, the direction of the motor is independent of the direction of the current flow in the windings. Permanent Magnet (PM) stepper motor. Here the rotor is permanently magnetized.he hybrid stepper motor, as the name suggest is a motor designed to provide better efficiency by combining the pros of both the permanent magnet stepper motor and variable reluctance stepper motor. The VR and PM stepper motors are the most common type of stepper motors.
Entrez Gene Summary for COMT Gene. Catechol-O-methyltransferase catalyzes the transfer of a methyl group from S-adenosylmethionine to catecholamines, including the neurotransmitters dopamine, epinephrine, and norepinephrine. This O-methylation results in one of the major degradative pathways of the catecholamine transmitters.
She further explained COMT was a key enzyme in the metabolism of catecholamines, a group of hormones that include epinephrine, norepinephrine, and dopamine, so they wanted to find out if the COMT gene affected people's susceptibility to incident cardiovascular disease such as myocardial infarction or ischemic stroke and also wanted to learn if genetic variation in COMT would influence aspirin's potential benefit.