The mt array is self-centering. MTOC is usually found in the center or near the nucleus but may be moved to other point in cell. Cellulose orientation is determined by mt orientation. The binding site for the mt covers several tubulin molecules and is positively charged so it offsets the negative charge found on the mt and stablizes the mt . MAP s may be phosphorylated and do not bind to mt when phosphorylated.
Motor proteins can move up and down mts.
When colcemid is added to a living cell, mt s depolymerize. Neurons have mt arrays in their axons and dendrites.