AIM: to clone rat neurotrophin-4 (NT-4) total gene and construct expression plasmid for prokaryotic cells.
目的：克隆大鼠神经营养因子4全长基因，构建真核细胞表达质粒。
Receptor proteins in both eukaryotic and prokaryotic cells often form regular lattice or array in the membrane.
在真核生物和原核生物的生物膜上都存在由同种受体蛋白相互连接在一起形成的紧密二维排列。
Spirulina is a blue-green algae, prokaryotic cells do not, structural walls were very thin, easily digested and absorbed.
螺旋藻是一种蓝绿色的藻类生物，细胞没有原核、结构壁很薄，极易消化吸收。
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