Microfilaments
You will find microfilaments in most cells. They are the partner of microtubules. They are long, thin, and stringy proteins (mainly actin) compared to the rounder, tube-shaped microtubules. We'd like to say you can…
Microtubules
Microtubules are usually discussed with microfilaments. Although they are both proteins that help define cell structure and movement, they are very different molecules. While microfilaments are thin, microtubules are thick, strong spirals…
Microfilaments – Stringy Proteins
You will find microfilaments in most cells. They are the partner of microtubules. They are long, thin, and stringy proteins (mainly actin) compared to the rounder, tube-shaped microtubules. We'd like to say you can…
What are actin filaments?
Actin filaments (F-actin) are linear polymers of globular actin (G-actin) subunits and occur as microfilaments in the cytoskeleton and as thin filaments, which are part of the contractile apparatus, in muscle…
What is Myosin?
An Introduction to the Myosin Superfamily of Proteins The most commonly described motor proteins belong to the Myosin superfamily. Different motor protein functions of the myosin family. A. Myosin I…
Cytoskeleton: Definition, Structure & Function
You probably already know the role your own skeleton plays in your life; it gives your body structure and helps you move. Without it, you would be more like a…
Membrane Models
The fluid-mosaic model was not the first scientifically accepted paradigm to describe membrane structure The first model that attempted to describe the position of proteins within the bilayer was proposed…
Structural Classification of Membrane Proteins
Membrane proteins represent about a third of the proteins in living organisms. Based on their structure, there are main three types of membrane proteins: the first one is integral membrane…
Membrane Proteins
Phospholipid bilayers are embedded with proteins, which may be either permanently or temporarily attached to the membrane § Integral proteins are permanently attached to the membrane and are typically transmembrane (they span across…
Membrane
Membrane, in biology, the thin layer that forms the outer boundary of a living cell or of an internal cell compartment. The outer boundary is the plasma membrane, and the compartments enclosed by…
