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PHA（phytohemggutinin）又名植物血凝素，是一种活化T淋巴细胞的有丝分裂原、本文介绍从紧豆提取PHA的简便可行方法，此法制备的PHA经我院多年临床验证，效价稳定。1材料和方法将肾豆（购于广东新会县）晾干磨成细粉末，取肾豆粉10g于三角烧瓶中，加生理盐水20ml，置4℃冰箱中
PHA (phytohemggutinin), also known as phytohemagglutinin, is a kind of mitogen that activates T lymphocytes. In this paper, we introduced a simple and feasible method for extracting PHA from Triticum aestivum. PHA prepared by this method has been proved by our hospital for many years and its potency is stable. 1 Materials and Methods kidney beans (purchased from Xinhui County, Guangdong Province) dry ground into fine powder, take kidney bean flour 10g in conical flask, add saline 20ml, set 4 ℃ refrigerator