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.
The collagen protein is composed of a triple helix, which generally consists of two identical chains (Î±1) and an additional chain that differs slightly in its chemical composition (Î±2). The amino acid composition of collagen is atypical for proteins, particularly with respect to its high hydroxyproline content.ollagen, in the form of elongated fibrils, is mostly found in fibrous tissues such as tendons, ligaments and skin. It is also abundant in corneas, cartilage, bones, blood vessels, the gut, intervertebral discs and the dentin in teeth.