A 16-17kD bioactive polypeptide that had antibacterial against activities E. coli ML-35P and Pseudomonas aeruginosa ATCC65922 was purified from human LAK cells, which was named as HLP-3P21. N-terminal sequence of HLP-3P21 was PKRKAEGDAK.

• 从人LAK细胞酸溶性提取物中纯化出一多肽 ,Tricine SDS PAGE表观Mr 为 17× 10 3,命名为HLP 3P2 1(humanlymphocytepeptide) ,具有抗致病性大肠杆菌ML 35P及铜绿假单胞菌ATCC6 5 92 2的活性。