Figure 2: Human IgG1 against HIV-1 (PDB code 1HZH) and Trimming steps. a) the length of heavy (H & K, red and green) and light (L a M, blue and pink) chains are 457 & 215 aminoacid residue, respectively. b) 3D structure f hIgG1 constant domains by removing VH & VL domains (pyMol software).