Heterocyst

Heterocysts are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as Nostoc punctiforme, Cylindrospermum stagnale, and Anabaena sphaerica. They fix nitrogen from dinitrogen (N₂) in the air using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis. Nitrogenase is inactivated by oxygen, so the heterocyst must create a microanaerobic environment. The heterocysts' unique structure and physiology require a global change in gene expression. For example, heterocysts:

单词	heterocyst
释义	heterocyst /'hetərə,sɪst//'hɛtərə,sɪst/ 英汉-汉英词典 n. 异形细胞词组 \| 习惯用语您要查找的是不是： heterozygous adj. 杂合的 heterosexual n. 异性恋者 adj. 异性恋的 heterodoxy n. 非正统;异端 heterodyne adj. 电外差的 vi. 致差, 成拍, 产生外差效果 heterocyst n. 异形胞；[植] 异形细胞，异形（囊）胞网络短语: heterocyst development 异形胞发育 heterocyst differentiation 胞分化 heterocyst t 异形细胞英语百科 Heterocyst Heterocysts are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as Nostoc punctiforme, Cylindrospermum stagnale, and Anabaena sphaerica. They fix nitrogen from dinitrogen (N₂) in the air using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis. Nitrogenase is inactivated by oxygen, so the heterocyst must create a microanaerobic environment. The heterocysts' unique structure and physiology require a global change in gene expression. For example, heterocysts:
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heterocyst /'hetərə,sɪst//'hɛtərə,sɪst/

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网络短语:

Heterocyst