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.
When you are age 70 and work, how much can you earn before you have to pay taxes on social security in 2010? Angelamaria answered... how much money can my wife and I can make on interest and annuity, I'm on social security and I don't want to be paying lots of money for penalty on my social security.