Human defensins,found in the blood,intestinal tract and epithelial cells,are small,cystin-rich cationic peptides with special structure.
人类防御素是一种存在于血液、肠道及表皮细胞中
有
殊空间结构,富含
氨酸的阳离子多
。
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爆炸 第1季 We also talked about how epithelial cells are polar, having both apical and basal sides, and are selectively permeable, and lastly we took a brief look at how our glandular epithelial tissue forms both out endocrine and exocrine glands.
我们还讨论了

胞是如何极性的,具有顶端和基底两侧,并且具有选择性渗透性,最后我们简要了解了我们的腺
组织如何形成内分泌腺和外分泌腺。