https://www.ncbi.nlm.nih.gov/Structure/pdb/1CFN
1CFN: ANTI-P24 (HIV-1) FAB FRAGMENT CB41 COMPLEXED WITH AN EPITOPE-RELATED PEPTIDE
PROTEIN (BOUND PEPTIDE)PROTEIN (IGG2A KAPPA ANTIBODY CB41 (LIGHT CHAIN))PROTEIN (IGG2A-KAPPA ANTIBODY CB41 (HEAVY CHAIN))