Recombinant Bovine Alpha-S1-Casein (CSN1S1) Protein (His&Myc)

Name: Recombinant Bovine Alpha-S1-Casein (CSN1S1) Protein (His&Myc)
Brand: Beta LifeScience
SKU: BLC-00481P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

Collections: All products, High-quality recombinant proteins, Other recombinant proteins

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Product Overview

Description	Recombinant Bovine Alpha-S1-Casein (CSN1S1) Protein (His&Myc) is produced by our E.coli expression system. This is a full length protein.
Purity	Greater than 90% as determined by SDS-PAGE.
Uniprotkb	P02662
Target Symbol	CSN1S1
Species	Bos taurus (Bovine)
Expression System	E.coli
Tag	N-10His&C-Myc
Target Protein Sequence	RPKHPIKHQGLPQEVLNENLLRFFVAPFPEVFGKEKVNELSKDIGSESTEDQAMEDIKQMEAESISSSEEIVPNSVEQKHIQKEDVPSERYLGYLEQLLRLKKYKVPQLEIVPNSAEERLHSMKEGIHAQQKEPMIGVNQELAYFYPELFRQFYQLDAYPSGAWYYVPLGTQYTDAPSFSDIPNPIGSENSEKTTMPLW
Expression Range	16-214aa
Protein Length	Full Length of Mature Protein
Mol. Weight	30.4 kDa
Research Area	Others
Form	Liquid or Lyophilized powder
Buffer	Liquid form: default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution	Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%.
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.

Target Details

Target Function	Important role in the capacity of milk to transport calcium phosphate.; Antioxidant peptide has 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity.
Subcellular Location	Secreted.
Protein Families	Alpha-casein family
Database References	KEGG: bta:282208 STRING: 9913.ENSBTAP00000010119 UniGene: PMID: 27065254 The results give insight in phosphorylation of alpha(S1)-CN-8P and alpha(S1)-CN-9P, which seem to be regulated by a different set of genes. PMID: 25200775 Report proteomic detection of bovine alpha-S1-casein in term and preterm human colostrum. PMID: 23755758 Data indicate that the pepsin-pancreatin digest of alphaS-Casein exhibited anxiolytic-like activity. PMID: 23580614 The genetic effects of thyroglobulin and casein alpha s1 alpha in the body fat distribution of cattle are reported. PMID: 23148258 Alpha-S2-casein was less effective at preventing fibril formation by modified kappa-casein, whereas alpha- and alpha-S1 casein were comparably potent inhibitors. PMID: 21457703 Single or multiple amino acid substitutions within IgE-binding epitopes result in reduced binding of milk-specific IgE antibodies. Critical amino acids should be evaluated with individual patient sera to determine B-cell-epitope heterogeneity. PMID: 12897753 determination of T cell reactive epitopes PMID: 15482858 EMSA analysis comparing allelic variants of a polymorphic AP-1 binding site in the promoter region of CSN1S1; specific and reduced protein binding of oligonucleotides containing the G variant of the CSN1S1-175bp binding site was shown PMID: 15905454 An isoelectrofocusing pattern was identified, which may result from a novel CSN1S1 variant, named CSN1S1I, migrating at an intermediate position between CSN1S1B and CSN1S1*C. PMID: 18096958 Substitution effects of paternal CSN2alpha (s1) allele versus CSN2 alpha(s2) allele on protein yield deviations (YDs) are significant, whereas their effects on milk and fat YDs are not. PMID: 18263971

FAQs

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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.