Myosin II

Two heads and assembles into bipolar filaments

Small and non-processive

Function- Contraction

#Id: 7845

#Unit 1. Structure and Function of Biomolecules

#Id: 7846

#Unit 1. Structure and Function of Biomolecules

When the anomeric hydroxyl of a D-hexose is on the same side of the ring as C-6, the structure is β a by definition; when it is on the opposite side from C-6, the structure is α.

#Id: 7847

#Unit 1. Structure and Function of Biomolecules

The two diastereomers of glucose in its "pyranose" form are called the alpha (a) and beta (B) isomers, which differ in the orientation of the OH at C-1

#Id: 7849

#Unit 1. Structure and Function of Biomolecules

The pyranose form of glucose dominates (>99%) at equilibrium in aqueous solution

#Id: 7850

#Unit 1. Structure and Function of Biomolecules

The 6-membered cyclic form of sugars is usually called the “pyranose” form in reference to the cyclic ether pyran.

#Id: 7852

#Unit 1. Structure and Function of Biomolecules

The pyranose forms of the sugars are more stable than the furanose forms in solution.