我们以前用光镜组化和生化方法证明酚氧化酶 ( PO)存在于文昌鱼的表皮细胞及体表粘液中。本文用光镜和电镜酶细胞化学技术显示了酚氧化酶在成体文昌鱼其它组织中的分布。光镜组化显示 ,PO存在于成体文昌鱼的鳃和肠上皮细胞中 ,而在肌肉、脊索、神经管、鳍和成熟的生殖腺中均没? We previously demonstrated the presence of phenol oxidase (PO) in amphioxus epidermis and body surface mucus using light microscopy and biochemical methods. In this paper, using light microscopy and electron microscopy enzyme cytochemistry showed the phenolic oxidase distribution in other tissues of adult amphioxus. Light microscopy showed that PO was found in the gill and intestinal epithelial cells of adult amphioxus, but not in muscle, spinal cord, neural tube, fin, and mature gonads.