Let's suppose now we look at an infected cell. So the infected cell now contains viral components that have been created by that cell itself. So we have these different types of viral proteins. And what the cell does is it essentially takes a viral protein and it places on this complex here inside the cleft instead of this self antigen. So now we have a pathogenic antigen and antigen that comes from that pathogen, our virus. And now when the leukocyte swims by and notices this pathogenic antigen it will bind to it and initiate a set of different types of immune responses that will ultimately destroy this infected cell.