6 functions of membrane proteins

Contractile Actin Myosin Muscle fibres Muscle fibres Moving filaments Stationary filaments Storage Ovalbumin Casein Egg yolk Milk Reserve food Reserve food Toxins Snake venom Diptheria toxin Salivary juice of snakes Dipthena patients As enzymes Produced by dipther..

Cell membrane is present in both plant and animal cells. It is living, elastic and made of proteins and lipids (fats). Its function is to provide a mechanical barrier for the protection of the inner cell contents and to regulate the movement of molecules in and out of..

Plasma Membrane - The plasma membrane or cell membrane surrounds the cell contents in all types of cells. It is a multipurpose covering composed of phospholipids and proteins. fig. 16.4 - Cell Membrane Apart from the plasma membrane, an eu..

The cell membrane and the membranes of various cell structures exhibit the same structure and as such perform the same functions. However, the amount and arrangement of phospholipids and proteins varies in different cells and organelles. This variation accord..

Unit Membrane Concept - The molecular structure of cell membrane is still not clearly known. Several models have been proposed from time to time to explain its structure based on its physico-chemical properties. In the year 1935 Danielli and Dawson proposed that the cell me..

1) Proteins build new tissues of the body. 2) They maintain and replace damaged tissues. 3) They carry out regulating activities as enzymes and hormones. 4) They are protective as antibodies. 5) They help in other important activities such as movement of skeletal muscles, transport of ox..

The plasma membrane or cell membrane surrounds the cell contents in all types of cells. It is a multipurpose covering composed of phospholipids and proteins..

Proteins perform essential and specialized functions in living cells. Proteins are primarily responsible for the structure and strength of the body. Some proteins act as enzymes, hormones, blood clotting factors, etc. These are the dynamic functions..

Proteins are primarily responsible for the structure and strength of the bod..

. This bonding occurs between C=O group of one amino acid and N-H group of fourth amino acid in the chain. Due to this bonding polypeptide chain coils into spiral structure and forms right handed -helix. Each turn of a -helix has 3.6 amino acids. The a -helix is also known as 3.6..