With direct, indirectand ABC methods, the local distribution of IgA, Leu4, HLA-DR, CEA andtype 4 keratin in human intestinal mucosa was observed under LM and EM. The positive reaction of staining was remarkable with satisfactory results.

• 用直接法、间进法和ABC法,对IgA、Leu4、HLA-DR、CEA和4型角蛋白的定位,进行了光镜和电镜的观察,染色阳性反应显著,获得了满意的效果。