What is protien?

Question

defination of protien

Answer 1

It's protein, not protien...

See: http://en.wikipedia.org/wiki/Protein

Answer 2

Proteins are polymers of amino acids.  In other words they are chains of different amino acids, the order and structure of the amino acids determine the proteins function.  Proteins are coded by DNA. Essentially DNA holds the blueprints for what amino acids should be combined to make the necessary proteins for normal function

Answer 3

A protein molecule is an organic molecule made up of   Carbon ( C ) ; Hydrogen ( H )

Oxygen (O) and Nitrogen (N) atoms.

No protein can exist with out ANY one of the four mentioned above .

Thus , these are the constant and  integral part of every protein molecule .

The quantity of each one of them is different in different proteins .

In addition , a number  of metal and non-metal atoms are associated with proteins to give them

Specificity.

For example = Chlorophyll is a protein molecule with formula  C55  H72  O5  N4  Mg  !

Thus Mg ( Magnesium ) is associated with it !

Blood Haemoglobin is also a protein and Fe ( Iron )  is associated with it !!

In Invertebrates Haemoglobin is replaced by Haemocyanin and  Fe ( Iron ) is replaced by copper ( Cu )

In Onion and Garlic Sulfur ( S ) is associated with certain proteins that imparts strong smell to them !!

From = A Botanist

Answer 4

A large molecule composed of one or more chains of amino acids in a specific order determined by the base sequence of nucleotides in the DNA coding is refered to as protein.