Recombinant Guinea Pig Cytotoxic T-Lymphocyte Associated Protein 4 (CTLA4) Protein (His), Active

Name: Recombinant Guinea Pig Cytotoxic T-Lymphocyte Associated Protein 4 (CTLA4) Protein (His), Active
Brand: Beta LifeScience
SKU: BLC-06081P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

Collections: Co-inhibitory receptors, Featured immune checkpoint protein molecules, Immune checkpoint proteins, Recombinant proteins

Our products are highly customizable to meet your specific needs. You can choose options such as endotoxin removal, liquid or lyophilized forms, preferred tags, and the desired functional sequence range for proteins. Submitting a written inquiry expedites the quoting process.

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Product Overview

Description	Recombinant Guinea Pig Cytotoxic T-Lymphocyte Associated Protein 4 (CTLA4) Protein (His), Active is produced by our Yeast expression system. This is a protein fragment.
Purity	Greater than 90% as determined by SDS-PAGE.
Endotoxin	Less than 1.0 EU/μg as determined by LAL method.
Activity	The ED50 as determined by its ability to bind Mouse B7-1 in functional ELISA is less than 0.4 ug/ml.
Uniprotkb	H0VUB1
Target Symbol	CTLA4
Species	Cavia porcellus (Guinea pig)
Expression System	Yeast
Tag	C-6His
Complete Sequence	AMHVAQPAVVLASSRGVASFECEYASSHNANEVRVTVLQQVASRTTEICAATYTVERELAFPEDSACAGTSSGTRVNLTIQGLRAADTGLYICKVELMYPPPYFVGTGNGTQIYVIDPEPCPDSD
Expression Range	37-161aa
Protein Length	Partial
Mol. Weight	14.1 kDa
Research Area	Immunology
Form	Liquid
Buffer	0.2 μm filtered 1xPBS, pH 7.4
Storage	1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C.
Notes	Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

FAQs

Please fill out the Online Inquiry form located on the product page. Key product information has been pre-populated. You may also email your questions and inquiry requests to sales1@betalifesci.com. We will do our best to get back to you within 4 business hours.

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.