The second stage of glycolysis is an isomerization reaction. In this reaction the glucose-6-phosphate is rearranged into fructose-6-phosphate by the enzyme glucose phosphate isomerase. This is a reversible reaction under normal conditions of the cell.
Kinetochore. A specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape; the centromere is difficult to sequence. Please contribute to this project, if you have more information about this term feel free to edit this page.
Some of the spindle fibers extend out and connect to a kinetochore on either side of the centromere. The spindle fibers pull and tug on the kinetochores until all the chromosomes are lined up across the center of the cell. During metaphase, the spindle fibers form a lemon-shaped array. This is called the mitotic spindle.