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ＰＨＡ体内注射可明显地提高小鼠脾淋巴细胞的分裂指数，用此途径可制成优良的染色体标本。ＰＨＡ的效应在于促进已经转化的淋巴母细胞迅速进入分裂期。
PHA in vivo injection can significantly improve the mouse spleen lymphocyte division index, this method can be made excellent chromosome specimens. The effect of PHA is to promote the rapid entry of already transformed lymphoblasts into the dividing stage.