眾所周知,每個行業及產品線,都會在每年的時候產生銷量王,那么細胞因子/重組蛋白里面又有誰成為今年的銷量王呢?跟隨小編一起了解一下。
在整個銷售排行榜單當中,另外們驚訝的發現rHuApo-SAA1這樣一個重組蛋白的名字,這個產品對于小編來說,好像只看懂了rHu代表著重組人,其他好像一概沒看明白。但是作為一個勤奮好學的小編,怎么可能就到此為止,翻閱資料檢索網絡就是基本的操作,那么一起來看看我的成果吧。
rHuApo-SAA1,全稱Recombinant Human Apolipoprotein-Serum Amyloid A1,翻譯出來應該叫做重組人載脂蛋白血清淀粉樣蛋白A1,oh my god!中文名字就這么長,我只能說,哪些科學家們,真的厲害!請收下小編的膝蓋?。ㄎ艺娴奶y了)。
對于這個產品的描述是這樣的:
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.
為了方便大家查看,小編還是翻譯了一下,盡可能做到準確,僅供大家參考:
血清淀粉樣蛋白a(saa)是一個載脂蛋白家族,與高密度脂蛋白(hdl)結合循環。在炎癥刺激的24小時內,血漿中的apo-saa水平(通常為1-5μg/ml)增加500-1000倍,在這些條件下,是豐富的hdl-apo-脂蛋白。122個氨基酸非糖基化多肽,含18個氨基酸n末端序列,重組人apo-saa1為11.7kda蛋白,含104個氨基酸殘基。
Accession | |
GeneID | |
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.- 12 months from date of receipt, -20 to -70 °C as supplied.- 1 month, 2 to 8 °C under sterile conditions after reconstitution.- 3 months, -20 to -70 °C under sterile conditions after reconstitution. |
參考文獻看起來:
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...
因為時間關系,就沒有給大家整理那么全面,大家可以用上面關鍵詞在國內幾家數據庫中都可以檢索到文獻進行參考。
突然想起來,這種微量的產品保存和使用上是有技巧的:
1. 收到產品后請立即按照說明書推薦的條件保存。除非特別注明,相關產品均為凍干粉,由于微量的蛋白在凍干過程中沉積在管內,形成很薄或不可見的蛋白層,所以在打開管蓋前,我們建議在離心機中約8,000-12,000g離心10-30秒,使附著在管蓋或管壁上的蛋白聚集于管底。
2. 請根據實驗目的并按照產品簡介中Reconstitution一欄中的信息配制儲存液。大多數細胞因子或重組蛋白的凍干粉是非常容易溶解的,一般用移液槍的槍頭輕吹幾下或者輕輕搖晃瓶子,即可使細胞因子或重組蛋白完全溶解。請勿用vortex劇烈振蕩,以免蛋白變性而失活。
3. 具體的工作濃度請自行參考相關文獻,或者根據實驗目的,以及特定細胞和動物,通過實驗進行摸索和優化
至此,相信大家對于科學家們,已經是佩服的五體投地了,反正小編是佩服的不要不要的。好啦,這期就先到這里,下期再見啦