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.
Collagen is the protein that forms connective fibers in tissues such as skin, ligaments, cartilage, bones and teeth. Collagen also acts as a kind of intracellular âglueâ that gives support, shape and bulk to blood vessels, bones, and organs such as the heart, kidneys and liver.n the case of collagen, however, vitamin C is actually used up as it combines with two amino acids â lysine and proline â to form procollagen. Procollagen is then used to manufacture one of several types of collagen found in different tissues throughout the body.