众所周知,每个行业及产品线,都会在每年的时候产生销量冠军王,那么细胞因子/重组蛋白里面又有谁成为今年的销量冠军王呢?跟随小编一起了解一下。
在整个销售排行榜单当中,另外们惊讶的发现rHuApo-SAA1这样一个重组蛋白的名字,这个产品对于小编来说,好像只看懂了rHu 代表着重组人,其他好像一概没看明白。但是作为一个勤奋好学的小编,怎么可能就到此为止,翻阅资料检索网络就是最基本的操作,那么一起来看看我的成果吧。
rHuApo-SAA1,全称Recombinant Human Apolipoprotein-Serum Amyloid A1,翻译出来应该叫做重组人载脂蛋白血清淀粉样蛋白A1,oh my god!中文名字就这么长,我只能说,哪些科学家们,真的厉害!请收下小编的膝盖!(我真的太难了)。
对于这个产品的描述是这样的:
Serum amyloid A proteins(SAA)represents a family of apolipoproteins that circulates in association with high-density lipoproteins(HDL).The level of apo-SAA,normally 1-5μg/ml in plasma,increases 500-1000 fold within 24hoursof an inflammatory stimulus and,under these conditions,is the most abundant HDL apo-lipoprotein.The human SAA gene codes for a 122 amino acid non-glycosylated polypeptide,which contains an 18 amino acid N-terminal sequence.Recombinant human apo-SAA1 is an 11.7 kDa protein containing 104 amino acid residues.
为了方便大家查看,小编还是翻译了一下,尽可能做到准确,仅供大家参考:
血清淀粉样蛋白a(saa)是一个载脂蛋白家族,与高密度脂蛋白(hdl)结合循环。在炎症刺激的24小时内,血浆中的apo-saa水平(通常为1-5μg/ml)增加500-1000倍,在这些条件下,是最丰富的hdl-apo-脂蛋白。122个氨基酸非糖基化多肽,含18个氨基酸n末端序列,重组人apo-saa1为11.7kda蛋白,含104个氨基酸残基。
Accession | P0DJI8 |
GeneID | 6288 |
Source | Escherichia coli. |
Molecular Weight | Approximately 11.7 kDa, a single non-glycosylated polypeptide chain containing 104 amino acids. |
Quantity | 10μg/50μg/1000μg |
AA Sequence | RSFFSFLGEA FDGARDMWRA YSDMREANYI GSDKYFHARG NYDAAKRGPG GVWAAEAISD ARENIQRFFG HGAEDSLADQ AANEWGRSGK DPNHFRPAGL PEKY |
Purity | > 98 % by SDS-PAGE and HPLC analyses. |
Biological Activity | Fully biologically active when compared to standard. The biological activity determined by a chemoattract bioassay using human monocytes is in a concentration range of 10-100 ng/ml. |
Physical Appearance | Sterile Filtered White lyophilized (freeze-dried) powder. |
Formulation | Lyophilized from a 0.2 μm filtered concentrated solution in 20 mM Tris-HCl, pH 9.0, 150 mM NaCl. |
Reconstitution | We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions. |
Stability & Storage | Use a manual defrost freezer and avoid repeated freeze-thaw cycles. |
参考文献看起来:
1.Expression of apolipoprotein serum amyloid A mRNA in human atherosclerotic lesions and cultured vascular cells: implications for serum amyloid A function. 作者:Meek, R. L., Urieli-Shoval, S., Benditt, E. P.
2. Serum amyloid A (SAA): An acute phase protein and apolipoprotein 作者:Ernst Malle,Armin Steinmetz,John G. Raynes
3. [No significant influence of serum amyloid A1 genotypes on serum lipids or HDL clearance] 作者:A Wada,T Yamada,K Itoh...
突然想起来,这种微量的产品保存和使用上是有技巧的:
1. 收到产品后请立即按照说明书推荐的条件保存。除非特别注明,相关产品均为冻干粉,由于微量的蛋白在冻干过程中沉积在管内,形成很薄或不可见的蛋白层,所以在打开管盖前,我们建议在离心机中约8,000-12,000g离心10-30秒,使附着在管盖或管壁上的蛋白聚集于管底。
2. 请根据实验目的并按照产品简介中Reconstitution一栏中的信息配制储存液。大多数细胞因子或重组蛋白的冻干粉是非常容易溶解的,一般用移液枪的枪头轻吹几下或者轻轻摇晃瓶子,即可使细胞因子或重组蛋白完全溶解。请勿用vortex剧烈振荡,以免蛋白变性而失活。
3. 具体的最佳工作浓度请自行参考相关文献,或者根据实验目的,以及特定细胞和动物,通过实验进行摸索和优化
至此,相信大家对于科学家们,已经是佩服的五体投地了,反正小编是佩服的不要不要的。好啦,这期就先到这里,下期再见啦!