Recombinant Protein

Products of Sino Biological

Recombinant Protein Features

All Produced in House

All recombinant proteins are produced in house. This means we can ship them right away because we have them in stock, and we can help you troubleshoot. It also means bulk package is available with big discount.

Various Species

Our recombinant proteins span various species which include, but are not limited to, the species listed below.

Human	Ferret
Mouse	E. coli
Rat	Influenza Virus
Rhesus	HIV (Human Immunodeficiency Virus)
Canine	HCMV (Human Cytomegalovirus)
Bovine	RSV (Human Respiratory Syncytial Virus)

Expression Host and Bioactivity

Over 80% recombinant proteins are mammalian cell-expressed. Mammalian cell expression ensures the proper folding, glycosylation, gamma-carboxylation and other post-translational modification of recombinant proteins.
The bioactivity assay results of several recombinant protein products are shown in table 1.

Table 1 Protein Bioactivity
Protein name	Sino Biological	US leading brand	Protein name	Sino Biological	US leading brand
	Bioactivity (ED₅₀ ng/ml)			Bioactivity (IC₅₀ )
GCSFR	1-4	1000-4000	SerpinA1	< 3.0 nM	< 5.0 nM
TrkA/NTRK1	40-150	800-4000	SerpinF2	< 0.5 nM	< 2.0 nM
aFGF	0.05-0.2	0.1-0.3	mouse SerpinF2	< 0.5 nM	< 1.0 nM
bFGF	0.02-0.1	0.1-0.6	TFPI	< 0.4 nM	< 0.75 nM
EGF	0.047	0.02-0.1	mouse TFPI	< 0.15 nM	< 1.0 nM
NGF	0.4-1	0.2-2	TFPI2	< 2.0 nM	< 5.0 nM

Purity

The majority of our recombinant proteins are purified to above 95% purity, suitable for most in vitro experiments.
Some recombinant proteins are purified to purity over 99%.
The SDS-PAGE images of recombinant proteins are provided.

Endotoxin Level

Human cell-expression ensures lower endotoxin level of most recombinant proteins.
Recombinant proteins were assessed for endotoxin using the Limulus Amoebocyte Lysates (LAL) assay, and the endotoxin levels are lower than 1.0 EU / μg.
The endotoxin level of TGF-beta 1 (CATALOG #: 10804-HNAH) is 0.15 EU / mg protein, and bFGF (CATALOG #: 10014-HNAE) is < 1.0 EU per mg protein as determined by the LAL method.

Formulation and Stability

All recombinant proteins are carrier-free, which reduces the disturbance of your experiment from the addition of a carrier protein (such as BSA).
Most recombinant proteins are lyophilized from a sterile filtered solution containing protective agent: trehalose and mannitol. Trehalose is effective for stabilizing protein when lyophilized and during storage in solid state, and also for maximizing recovery upon reconstitution. Mannitol effectively prevents aggregation of protein.

Affordable Price

All reagents are available in both small retails and bulk packages - both offering 30-80% cost saving compared to currently leading brands.

New Protein Update

Over 30 protein products are produced per week.
New product information is updated weekly.

Recombinant Protein Products Overview

Sino Biological provides a wide selection of quality recombinant proteins for research, which are directed towards the following research topics:

Over 1000 recombinant proteins for cancer research
Over 1200 recombinant proteins for immunology research
Over 700 recombinant proteins for signal transduction research
Over 600 recombinant proteins for neuroscience research
Over 600 recombinant proteins for stem cell research
Over 800 recombinant proteins for cardiovascular research
Over 700 enzymatic proteins
Over 180 viral proteins

We focus on hot proteins, such as:

Adhesion molecules	Growth factors
Cytokines	Kinases
Chemokines	Proteases
Cancer biomarkers	Phosphatases
CD antigens	Transcription factors
Fc receptors

We also focus on biomarkers and disease therapeutic targets.

Sino Biological is the world's largest influenza research reagents manufacturer. We have 170+ recombinant influenza viral proteins, including hemagglutinin (HA), neuraminidase (NA), Nucleoprotein (NP), M1, NS1, and NS2, which cover 79 strains of influenza A H1-H16 and influenza B.

Bulk Quantities

Big discount for bulk order.
Please contact us for a bulk order quote.

Contact us

Notes: Search products in the search box on the top of the page. When the recombinant protein is not found, you are encouraged to submit your request so that the proteins of interest be placed on the priority list. And you will be contacted when the protein is available.

E-mail Your Service Request to: Service@sinobiological.com

E-mail Your Product Order to: Order@sinobiological.com

Leave Your Message On-Line: On-line message

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