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.
1. We want to express this sequence, please send a quotation. 2. What is the endotoxin level when the customer receive protein? 3. To what extent do you usually remove endotoxin in in vivo experiments? 4. Can you offer stability test after protein expressinon ? If it is right, please let me know the price.
A:
Thanks for your email. We have the following protein. Recombinant Human Hyaluronidase PH-20(SPAM1) CSB-MP022471HU >> Mammalian cell You can view the product information on this page in details. In addition, we have another partial protein to recommend: Recombinant Human Hyaluronidase PH-20(SPAM1),partial CSB-YP022471HU1 >> Yeast CSB-EP022471HU1 >> E.coli CSB-BP022471HU1 >> Baculovirus CSB-MP022471HU1 >> Mammalian cell Expression Region: 36-482aa;partial Tag information: Tag type will be determined during the manufacturing process. The expected tag for each expression system is listed as follows: EP,BP,MP:N-terminal 10xHis-tagged and C-terminal Myc-tagged;YP:N-terminal 6xHis-tagged Sequence:
1. We could provide the endotoxin removal service for free. And you will receive the protein with entotoxin <1.0 EU/ug. 2. At present, we do not have a detailed stability test for individual proteins. From our current preservation situation, the liquid form protein (with 50% glycerol) could keep at -20℃/-80℃ for about 6 months.The lyophilized powder could be stored at -20°C/-80°C for about 12 months. If there is any instability occur during this period, we can provide complete after-sales services.
Q:
Could you please let me know the concentration ? Can I know it before ordering ?
A:
Thanks for your inquiry. Our normal concentration is 0.1-0.5mg/ml. If you have any request on the concentration, please communicate with us in advance.
Involved in sperm-egg adhesion. Upon fertilization sperm must first penetrate a layer of cumulus cells that surrounds the egg before reaching the zona pellucida. The cumulus cells are embedded in a matrix containing hyaluronic acid which is formed prior to ovulation. This protein aids in penetrating the layer of cumulus cells by digesting hyaluronic acid.
基因功能參考文獻:
Human posterior head 20 (hPH20) and homo sapiens sperm acrosome associated 1 (hSPACA1) immunocontraceptive epitopes reduced fertility in male/female mice. PMID: 25209425
results indicate that neither rHuPH20 nor its directly generated HA catabolites have inflammatory properties in the air pouch model, and rHuPH20 can instead inhibit some aspects of inflammation, such as neutrophil infiltration into the air pouch. PMID: 24778442
HSPA2 regulates the expression of sperm surface receptors involved in human sperm-oocyte recognition, such as arylsulfatase A and SPAM1. PMID: 23247813
The interaction between SPAM1, ARSA and HSPA2 in a multimeric complex mediating sperm-egg interaction. PMID: 23209833
PH20 is elevated in demyelinating lesions and that increased PH20 expression is sufficient to inhibit oligodendrocyte precursor cell maturation and remyelination. PMID: 23463525
SPAM1 mRNA & protein occur in all 3 regions of epididymis & vas deferens. It has hyaluronidase activity at pH 7.0. The proximal promoter has epididymal transcription factor sites including androgen receptor elements. Its role may be in sperm maturation. PMID: 12932297