配基

A recep to r- ligand combination is taken up at one cell surface, transported to the endosome, and then released for transport to the far surface of the cell.

一个受体和配基的结合体在一个细胞表面被吸收，被输送到内吞体，然后被释放为了可以传输到更远的细胞表面。

METHODS: Cytometry and soft agar were employed in observing the biological characters of MEC-1 and Mc3 cell strain. The expressions of the two sub-types of MEC-1 and Mc3 cell strain, SSTR1 and SSTR2, were detected by hybridization in situ. The condition of the binding between MEC-1, Mc3 and 125I-RC-160 was analyzed by radioactive genin binding analysis.

采用细胞计数法、软琼脂法等观察MEC-1及Mc3细胞株生物学特性；以原位杂交法检测MEC-1，Mc3细胞株SSTR1及SSTR2两种亚型的表达情况；以放射配基结合分析法分析MEC-1，Mc3细胞与125I-RC-60的结合情况。

OBJECTIVE: To discuss the expressions of 2 sub-types of SSTR, SSTR1 and SSTR2 in human salivary gland mucoepidermoid carcinoma(MEC-1 ) and the high metastatic cell strain(Mc3) of human mucoepidermoid carcinoma and the differences of these two receptors in the binding with SSTR radioactive genin, 125I-RC-160, and the correlations with prngnostic rehabilitation.

目的：探讨人涎腺粘液表皮样癌细胞系(MEG-1)及人粘液表皮样癌高转移细胞株(Mc3)生长抑素受体两种亚型(SSTR1、SSTR2)的表达与SSTR的放射配基125I-RC-160的结合差异与预后康复的相关性。

Furthermore, during the ligand binding process, the decrease in βturns and increase in α-helices was a slow process.

此外，在蛋白与配基的结合过程中，β-回折的减少和α-螺旋的增加是一个缓慢的过程。

The effects of Caoguozhimu Decoction, a TCM antiepileptic, on NMDA receptor binding capacity and the expression of NMDAR1 mRNA in pentylene tetrazole-kindled rat model were observerd by the ligand-receptor method and i n situ hybridization, with MK-801 as a contrast.

观察抗癫痫中药草果知母汤在阻断戊四唑点燃模型形成过程中，对兴奋性氨基酸类神经递质Glu的受体NMDA结合力及其NMDAR1 mRNA的影响。以NMDA的竞争性拮抗剂MK- 801为对照，用配基受体法、原位杂交法检测相应指标的变化。

At 30 min the FITC-HRP was mainly observed in the nucleus while the RnR remained in the perinuclear zone of cytoplasm.

上述结果提示，RnR与其配基结合后进入细胞内并发挥生物学效应。

Methods: AR and ER expression and its distribution in the preputial cells of 28 cases with different types of hypospadias were examined by radioligand binding assay.

通过受体的放射配基结合分析，对28例不同程度的先天性尿道下裂患儿外生殖器皮肤细胞内的AR、 ER的表达及细胞内的分布进行了测定。

Part Ⅲ Expression of an iron-superoxide dismutase from camphor seeds, resubstitution of the metal cofactors and the simulated structure Abstract

第三部分：樟树种子超氧化物歧化酶基因的克隆，表达与其金属配基的置换与结构模拟

NodD binds to and bends target promoters through anchoring two tandem and individual specific DNA sites. NodD functions as a tetramer, which has a V-shaped main body. Tetrameric NodD is to change its own conformation rather than its oligomeric forms in response to small signal molecules. The specific interaction between each NodD DNA-binding domain and each specific DNA site does not alter itself in spite of naringenin induction, and the induced conformational change is transferred from protein to DNA. Only the DNA conformation incited by induced NodD is competent for RNA polymerase to form the transcriptional open complex. It cannot be excluded that NodD may have protein-to-protein contacts with RNA polymerase, and that the NodD conformational change may also directly contribute to the transcriptional open complex formation. However, the NodD conformational change itself cannot serve as the determinant of the transcriptional molecular switch.

通过研究，我们提出了初步的NodD操纵子激活模型：第一，四聚体是NodD蛋白的功能单位，它通过铆钉两个串联的相对独立的DNA靶位点结合被诱导的启动子；第二，小分子配基的结合是改变NodD四聚体的构象而不是引发不同形式的寡聚体，在我们的模型中，NodD四聚体缩小其V形主体的弯折角，进而缩短其DNA结合功能域的间距；第三，小分子信号的诱导并没有改变NodD的DNA结合域和其DNA靶位点的相互作用，NodD的构象改变由蛋白质经其双铆钉位点传递给DNA；第四，只有诱导状态的NodD激发的DNA构象才能有效地使RNA聚合酶形成转录开放复合物；第五，不排除NodD与RNA聚合酶可能有直接的相互接触位点，不排除NodD构象的改变可能直接有利于RNA聚合酶形成转录开放复合物，但是我们认为NodD构象改变本身不是充当转录激活开关的决定因素。

Liposome properties and biological behaviors can be controlled by surface modification. Attachments of hydrophilic polymers, such as poly, enable them to have a prolonged circulation time without being opsonized and recognized by mononuclear phagocytic system.

通过表面修饰可以改变脂质体的性质和生物学行为：在脂质体表面修饰亲水性高分子可以阻碍血浆成分的调理作用，减少脂质体被网状内皮系统识别和摄取，使脂质体具有长循环的特点；在脂质体表面修饰特异性的配基，能使脂质体具有主动靶向的特性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。