Keywords
alpha helix, antigen presentation, artwork, beta sheet, biochemical, biochemistry, biological, biology, black background, healthcare, hla-a2, illustration, immune system, immunological, immunology, medical, medical illustration, medicine, mhc class i, model, molecular, molecular model, molecular structure, molecule, no-one, nobody, protein, proteomics, research, strand, structure, t cell receptor b7, t lymphocyte, tax peptide, tertiary structure, viral, stock illustration, royalty free illustrations, stock clip art icon, stock clipart icons, logo, line art, EPS picture, pictures, graphic, graphics, drawing, drawings, vector image, artwork, EPS vector arts, fine art prints, print, poster, posters, mural, wall murals, u70008118