E. coli biotin ligase
(BirA) is highly specific in covalently attaching biotin to the 15
amino
acid AviTag peptide. This recombinant protein was biotinylated in
vivo
by AviTag-BirA technology, which method is BriA catalyzes amide
linkage
between the biotin and the specific lysine of the AviTag.
The tag type will
be
determined during production process. If you have specified tag
type, please tell us and we will develop the specified tag
preferentially.
產品提供形式:
Lyophilized powder
Note: We will
preferentially ship the format that we have in stock, however,
if you have any special requirement for the format, please
remark your requirement when placing the order, we will prepare
according to your demand.
復溶:
We recommend that this vial be briefly centrifuged
prior
to opening to bring the contents to the bottom. Please reconstitute
protein in deionized sterile water to a concentration of 0.1-1.0
mg/mL.We recommend to add 5-50% of glycerol (final concentration)
and
aliquot for long-term storage at -20℃/-80℃. Our default final
concentration of glycerol is 50%. Customers could use it as
reference.
儲存條件:
Store at -20°C/-80°C upon receipt, aliquoting is
necessary for
mutiple use. Avoid repeated freeze-thaw cycles.
保質期:
The shelf life is related to many factors, storage
state,
buffer ingredients, storage temperature and the stability of the
protein
itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C.
The
shelf life of lyophilized form is 12 months at -20°C/-80°C.
貨期:
Delivery time may
differ from different purchasing way or location, please kindly
consult your local distributors for specific delivery time.
Note: All of our
proteins are default shipped with normal blue ice packs, if you
request to ship with dry ice, please communicate with us in
advance
and extra fees will be charged.
注意事項:
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet :
Please contact us to get it.
產品評價
問答及客戶評論
■ 常見問題解答
Q:
Hi! I'm a post-doc at the University of Parma, Italy. I managed to purify recombinant human DNASE2B from E. coli, but without any success. For the purification strategy, I chose His tag and Cobalt affinity chromatrography. May I ask you how you manage to produce this protein? Every information you could give me will be very helpful for me! I thank you in advance.
A:
Regarding the purification issue, did you only perform His tag and Cobalt affinity chromatrography purificaiton ? Have you tried to optimize in multiple conditions, for example, to further optimize the vector, culture conditions or try some other secondary purification methods, etc. Our article for your reference: https://www.cusabio.com/c-20275.html Choosing an appropriate purification method is required: For some applications, a crude extract is sufficient. However, for other uses, a high level of purity is required. To produce the protein with high purity, purifying the protein produced is necessary. Protein purification refers to a process that isolates one or more proteins from cells, tissues or whole organisms. A variety of purification strategies has been developed, such as size exclusion chromatography (SEC), separation based on charge or hydrophobicity, affinity chromatography (AC), and HPLC. Sorry, as we haven't expressed this protein before, we are not sure if there is some special problem during the purification, some proteins are easy to purify, but others are not, which need further optimization according to our experience. Sorry, for the time being, we can't share any useful experience specific to this protein. Probably you can try to optimize in multiple condition as we mentioend above.
Hydrolyzes DNA under acidic conditions. Does not require divalent cations for activity. Participates in the degradation of nuclear DNA during lens cell differentiation.
基因功能參考文獻:
These data identify DNase 2 as the predominant DNase on the mammalian skin surface and indicate that its activity is primarily targeted to exogenous DNA. PMID: 21390259
gene lie head-to-head with the urate oxidase gene PMID: 11700027
The DLAD-/- mice develop cataracts of the nucleus lentis, and their response to light on electroretinograms is severely reduced; these results indicate that DLAD is responsible for the degradation of nuclear DNA during lens cell differentiation PMID: 12944971
DNase II-like acid DNase is synthesized as a precursor with a signal sequence, and is localized to lysosomes. DNase II-like acid DNase mRNA was found in cortical fiber cells but not epithelial cells PMID: 17509075
亞細胞定位:
Lysosome.
蛋白家族:
DNase II family
組織特異性:
Highly expressed in the eye lens. Detected in liver, but not in the other tissues tested.