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.
On a practical level, while there are 16 types of collagen, most in the human body is Type I-III. Type I collagen is incredibly strongâ¦ in fact, it is stronger than steel (gram for gram). It is a complex protein, made up of many different amino acids, but most commonly proline, glycine and hydroxyproline.