An eicosapeptide, H-Ser-Asp-Leu-Pro-Gln-Thr-His-Ser-Leu-Gly-Asn-Arg-Arg-Ala-Leu-Ile-Leu-Leu-Ala-Gln-OH, corresponding to the N-terminal amino acid sequence of the major component of human lymphoblastoid interferon was synthesized by a conventional method. The final deprotected peptide was purified by gel filtration on Sephadex G-25 and then by partition chromatography on Sephadex G-25. The eicosapeptide at a dose of 100 μg/ml inhibited the incorporation of 3H-thymidine into DNA of PHA-induced lymphocytes by about 15%.
通过常规方法合成了二十肽 H-Ser-Asp-Leu-Pro-Gln-Thr-His-Ser-Leu-Gly-Asn-Arg-Arg-Ala-Leu-Ile-Leu-Leu-Ala-Gln-OH,该肽与人淋巴细胞干扰素主要成分的N端
氨基酸序列相对应。通过凝胶过滤法(Sephadex G-25)和分区色谱法(Sephadex G-25)对最终去保护肽进行纯化。当剂量达到100微克/毫升时,该二十肽可抑制3H
胸苷掺入PHA诱导淋巴细胞DNA的比率约15%。