Which transport of protein's import belongs to gated transport?

下列哪些物质可能是配体(ligand)

Although the atoms buried in the interior of a protein have no direct contact with the ligand, they provide an essential scaffold that gives the surface its contours and chemical properties.

The region of a protein that associates with a ligand, known as its binding site, usually consists of a _____ in the protein surface formed by a particular arrangement of amino acid side chains.

Which of the following best describes the behavior of a gated channel A: It stays open continuously when stimulated. B: It opens more frequently in response to a given stimulus. C: It opens more widely as the stimulus becomes stronger. D: It remains closed if unstimulated.

能与胞外信号特异识别和结合，介导胞内信使生成，引起细胞产生效应的是（） A: carrierprotein B: channelprotein C: receptor D: ligand E: enzyme

在神经细胞电信号传递中发挥着重要作用是下列哪种通道() A: 电压门通道(voltage-gated channel) B: 配体门通道(ligand-gated channel) C: 应力激活通道(stress-activated channel) D: 葡萄糖转运蛋白(glucose transporter,GLUT)

所谓亲和萃取或亲和分配(affinity partitioning)，即把一种亲和配基（Ligand）与一种成相聚合物PEG或Dx以共价相结合，这种配基与欲提取的蛋白质有很强的亲和力。这样不但使体系具有双水相处理量大的特点，而且具有亲和层析专一性高的优点