An independent variable is the variable that the scientist changes,  and the dependent variables are the variables that the scientist  doesn't control.
Glycoprotein VI (platelet) also known as GPVI is a glycoprotein receptor for collagen which is expressed in platelets. In humans, glycoprotein VI is encoded by the GPVI gene.
By Dr Ananya Mandal, MD. Collagen is a protein made up of amino-acids, which are in turn built of carbon, oxygen and hydrogen. Collagen contains specific amino acids â Glycine, Proline, Hydroxyproline and Arginine. Collagen makes up approximately 30% of the proteins within the body.t is mostly found in fibrous tissues such as tendon, ligament and skin, and is also abundant in cornea, bone, blood vessels, cartilage, intervertebral disc and the digestive tract. In muscle tissue, collagen serves as a major component of endomysium.