Microtubules are regulated by a variety of proteins in neurons, including molecular motor proteins. Molecular motors transport organelles along the microtubule, but can also transport the microtubules themselves and organize them into regionally distinct patterns.n neurons, microtubules are also nucleated at the centrosome (located in the cell body of the neuron), but the microtubules are then severed from the centrosome so that they can be deployed into axons and dendrites.
Self employment taxes are comprised of two parts: Social Security and Medicare. You will pay 6.2 percent and your employer will pay Social Security taxes of 6.2 percent on the first $127,200 of your covered wages. You each also pay Medicare taxes of 1.45 percent on all your wages - no limit.
You will have to pay federal taxes on your Social Security benefits  if you file a federal tax return as an individual and your total  income is more than $25,000. + 2 others found this useful. Karen Bush.ou will have to pay federal taxes on your Social Security benefits  if you file a federal tax return as an individual and your total  income is more than $25,000. + 2 others found this useful. Karen Bush.