DAPTA is a CCR5 inhibitor peptide. The sequence contains 8 amino acids. The N-terminus of the peptide chain is D-type amino acids, and the C-terminus is closed by an amide bond. DAPTA also has anti-HIV activity.Because the sequence contains more Thr, and contains Ser and Phe, there are a lot of hydroxyl functional groups in the peptide sequence, and the activity is higher.