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- 详细信息
- 文献和实验
- 技术资料
- 库存:
45
- 英文名:
Phe-Met-Arg-Phe amide trifluoroacetate
- CAS号:
159237-99-7
- 供应商:
上海莼试
- 保存条件:
Store at -20°C
- 规格:
5mg 10mM*1mLinWater 25mg
| 货号 | CS-01Y75179 | 规格 | 5mg 10mM*1mLinWater 25mg |
| CAS号 | 159237-99-7 | 分子量 | 826.81 |
| 含量 | >98.00% | 别名 | N/A |
| 分子式 | C33H44F6N8O8S | 化学名 | N/A |
| 产地 | 国产 | 用途 | 仅供科研研究实验 |
分子式:C33H44F6N8O8S

分子量:826.81
溶解度:H2O : ≥ 50 mg/mL (60.47 mM)
储存条件:Store at -20°C
General tips:For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.
Shipping Condition:Evaluation sample solution : ship with blue ice All other available size: ship with RT , or blue ice upon request
Phe-Met-Arg-Phe amide trifluoroacetate is an activator of K+ current, with ED50 of 23 nM in the peptidergic caudodorsal neurons.In the molluscan central nervous system, Phe-Met-Arg-Phe amide (FMRFa) acts on K+ channels in sensory, motor-, and neuroendocrine neurones. Phe-Met-Arg-Phe amide activates a novel K+ current that is characterized by a combined voltage- and receptor-dependent gating mechanism, with both factors being necessary for opening of the channels[1]. Phe-Met-Arg-Phe amide (1 μM) significantly inhibits glucose stimulated (300 mg/dL) insulin release (p<0.005) and somatostatin release (p<0.01) from the isolated perfused pancreas. Phe-Met-Arg-Phe amide (FMRF-NH2) (1 and 10 μM) is without effect on glucagon secretion, either in low glucose (50 mg/dL), high glucose (300 mg/dL), or during arginine stimulation (5 mM)[2].Phe-Met-Arg-Phe amide (FMRFamide) stimulates growth hormone secretion in conscious OVX rats. The presence of Phe-Met-Arg-Phe amide-like immunoreactivity in neuronal elements in the hypothalamus suggested a role for this in the hypothalamic control of the anterior pituitary function. The injection of 200 ng (313.8 picomoles) of FMRFamide (in 2 uL) produces a significantly increased plasma GH 15 min after injection. The GH-increasing effect of 400-800 ng (627-1255 picomoles) of FMRFamide is already developed after 5 min and lasted up to 30 min[3].[1]. Kits KS, et al. Phe-Met-Arg-Phe-amide activates a novel voltage-dependent K+ current through a lipoxygenasepathway in molluscan neurones. J Gen Physiol. 1997 Nov;110(5):611-28. [2]. Sorenson RL, et al. Phe-met-arg-phe-amide (FMRF-NH2) inhibits insulin and somatostatin secretion and anti-FMRF-NH2 sera detects pancreatic polypeptide cells in the rat islet. Peptides. 1984 Jul-Aug;5(4):777-82. [3]. Ottlecz A, et al. Phe-Met-Arg-Phe-amide (FMRFamide) stimulated growth hormone secretion in conscious OVX rats. Neuropeptides. 1987 Feb-Mar;9(2):161-7.
注意事项:
抗逆滴加序列
每次向板内滴加抗原时,移液器滴头要与平面45度悬空,不要触碰到孔内的液体,由后向前依次滴加(即浓度由低往高滴加)。
抗感染反应期
抗原抗体在室温20~25℃下,必须反应30min以上,若环境温度低于室温,可将微量反应板置于恒温培养箱中,使二者充分反应。
旅游温度
磷酸盐缓冲液的pH值要在高压灭菌后进行滴定,往往在高压后pH值会有所改变,所以高压后再调一次pH值更为准确。磷酸盐缓冲液一经使用保存期不要超过3周。当pH<5.8时,红细胞会产生自凝现象;当pH>7.8时,图形洗脱加快,易造成肉眼观察产生误差;p H=7.2时,红细胞沉降最充分,图形最清晰。
当滴注 1%红细胞悬液时,应经常摇晃红细胞悬液,使红细胞均匀地分布在磷酸缓冲液中,以防止红细胞下降。
反应时间及温度
加入鸡红血球之后,反应板在室温(20~25℃)静置30~40min,对照孔血球下沉于孔底,即可判定结果。若室温达不到实验要求,需相应调整反应时间。当环境温度低于4℃时,红细胞发生自凝;高于37℃时,会发生反应物分离和红细胞溶血。
使用方法:
1.本蛋白酶抑制剂混合物为100×的储存液,使用时按照1:100的比例加入到裂解液中(例如,1ml裂解液中加入10μl蛋白酶抑制剂混合物),混匀后即可使用。根据需要,0.5M的EDTA也按照1:100的比例加入到裂解液中(如用于检测金属蛋白酶活性,则不宜添加EDTA)。含有蛋白酶抑制剂混合物的裂解液宜现用现配,不宜配制后冻存待后续使用。
2. 待所需的抑制剂添加完毕混匀后,就可以开始进行哺乳动物组织的裂解和蛋白提取。
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文献和实验Synthesis of Dipeptides with [CH20] Amide Bond Mimetics
This chapter describes the synthetic procedures leading to ether dipeptide isosteres of the Phe-ψ[CH 2 O]-spiro-C x ( 9a–9e , Fig. 1 ) and Phe-ψ[CH 2 O]-Allylglycine ( 13 , Fig. 2 ). Development of methods which lead to mimetics of amide
。因为Cys、Met、Trp或者其侧链很容易氧化。如果可能的话应尽量避免这些残基在序列中出现,或者做一些保守的替换。例如,用Ser代替Cys,Norleucine代替Met,Tyr、Phe或其他一些疏水性残基如Leu代替Trp。Lys可以用来代替Arg。 改善溶解性的多肽序列的设计方案1. 改变序列的N或C端对酸性肽(即在中性条件下多肽带负电荷),我们推荐多肽为这样的形式:Acetyl-peptide-COOH(多肽N端乙酰化,C端自由羧基),以使多肽尽可能多的带负电荷。对碱性肽(即在中性条件下多肽
in size and shape but show variations in aromatic, electrostatic, and hydrogen bonding properties. These variations provide opportunities to study properties of importance for amide bond mimicry. The derivatives are synthesized from protected natural amino
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