Myoglobin

Myoglobin is a commonly illustrated example of a biologically important protein. The primary role of myoglobin is for storage of oxygen. The structure below is the deoxygenated form of sperm whale myoglobin, taken from the Brookhaven Protein Database (structure ref = 5MBN, author = T. Takano).

In order to view this molecule correctly, you must have the CHIME Plug-in properly installed. To rotate this molecule, move your pointer over the structure, then hold the button down while 'dragging' the pointer.

Levels of structure in Myoglobin

Primary structure

The sequence of amino acids in the single polypeptide chain of this molecule.

Secondary structure

The three-dimensional arrangement of the protein backbone. Best illustrated in this drawing by selecting "Backbone", "Ribbons", or "Ribbons +". In this molecule, the alpha helices are clearly seen.

Tertiary structure

The three-dimensional arrangement of the protein, including all side chains. The "Wireframe" and "Ball & Stick" views give the best illustration of this structure level.

Quaternary structure

Focuses on interaction of different polypeptide chains. This can be best illustrated by examination of the Hemoglobin stucture, which consists of four polypeptide chains, each of which is similar to myoglobin.

This page was last modified on September 01, 1997
and was written and is maintained by Clarke Earley
Kent State University Stark Campus
Department of Chemistry
email: cearley@stark.kent.edu
© 1997 by Clarke Earley, Kent State University.