Rat IgG2b Fc Protein

Catalog No.	Product Name	Size	List Price (US$)	Quantity
BP4127	In Vivo Grade Recombinant Rat IgG2b Fc Protein	1 mg	500.00

Catalog No.

Product Name

Size

List Price (US$)

Quantity

BP4127

In Vivo Grade Recombinant Rat IgG2b Fc Protein

1 mg

500.00

Description

Background

In vivo grade recombinant natural and engineered rat IgG2b Fc proteins (rtIgG2b Fc), and recombinant rat IgG2b isotype control antibody and mutants are available. Biotinylated rtIgG2b Fc, and rtIgG2b Fc with Avi-, His-, and Flag-tags are also available. Please contact us to ask for a quote for the engineered rat IgG2b Fc proteins, biotinylated rtIgG2b Fc, and rtIgG2b Fc with Avi-, His-, and DYKDDDDK-tags. The recombinant rat IgG2b Fc protein and mutants can be used as the isotype control of the rtIgG2b antibodies and the rtIgG2b Fc fusion proteins in various in vitro and in vivo experiments.

BP4123: In Vivo Grade Recombinant Rat IgG2b Fc protein (rtIgG2b Fc)

The in vivo grade recombinant rat IgG2b Fc protein (rtIgG2b Fc) was produced in mammalian cells and purified by protein G. The rtIgG2b Fc protein includes the CH2 and CH3 domains of the heavy chain constant region as well as the hinge region before the CH2 domain.
Molecular weight: Predicted 25.8 kDa. Due to glycosylation, the recombinant rat IgG2b Fc protein migrates to 32-35 kDa based on the Bis-Tris PAGE result.
Purity: >95% by SDS-PAGE under reducing conditions
Endotoxin Level: Less than 1 EU/mg of protein as determined by LAL method.
Formulation: 0.2 μM filtered solution of 1x PBS.

Shipping: The in vivo grade recombinant rat IgG2b Fc protein is shipped with ice pack. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
1 month from date of receipt, 2 to 8°C as supplied.
12 months from date of receipt, -20°C to -70°C as supplied.

References of Rat IgG2b Fc Protein

Specificity of mouse and human Fcgamma receptors and their polymorphic variants for IgG subclasses of different species.

Wang, Y., et al. Eur J Immunol. 2022 May;52(5):779-792. PMID: 35188671

Mice produce four IgG subclasses (IgG1, IgG2a/c, IgG2b, IgG3) and express four classical IgG receptors. Rat IgG2b complexes bind to all mouse FcγRs, rat IgG1 complexes bind exclusively to mFcγRIIB and mFcγRIII, and rat IgG2a complexes show no binding to mFcγRs except for a weak interaction with mFcγRIII. The study provides a comprehensive analysis of IgG subclass interactions across 12 species with human and mouse FcγRs, building on prior studies that documented intra-species binding.

(Tags: activity of Rat IgG2b Fc Protein; Rat IgG2b Fc Protein)

Rat IgG mediated circulatory cell depletion in mice requires mononuclear phagocyte system and is facilitated by complement.

Sun, Y., et al. J Leukoc Biol. 2020 Sep;108(3):997-1008. PMID: 31975410

Rat monoclonal antibodies, including anti-C5aR (20/70, IgG2b), anti-VLA4 (PS/2, IgG2b), anti-CD11b (M1/70, IgG2b), and anti-CD11a (M17/4, IgG2a), were tested for cell depletion effects in mice. The study demonstrates that Ab-mediated cell depletion, reliant on the Fc portion, is an efficient tool for studying cell function under normal and disease conditions. The mononuclear phagocyte system and complement facilitate depletion, with Rat IgG2b antibodies showing significant activity.

(Tags: Rat IgG2b Fc Protein for flow cytometry; Rat IgG2b Fc Protein for mouse tumor model)

A general requirement for FcγRIIB co-engagement of agonistic anti-TNFR antibodies.

Zhang, L., et al. J Immunol. 2012 Sep 15;189(6):3004-3011. PMID: 22851718

Mouse IgG1 and rat IgG2a Fcs preferentially bind to mouse FcγRIIB, while mouse IgG2a and rat IgG2b Fcs bind to activating FcγRs. A non-depleting rat IgG2a Fc anti-mouse CD27 antibody was more effective than a depleting rat IgG2b Fc clone in antitumor responses against CD27+ and CD27- EL4 syngeneic tumors. The study supports a general requirement for FcγRIIB co-engagement, rather than activating FcγRs, for agonistic anti-TNFR antibodies, highlighting the role of Fc interactions in therapeutic efficacy.

(Tags: Rat IgG2b Fc Protein in vivo; Rat IgG2b Fc Protein dose)

Efficient Generation of Bispecific Murine Antibodies for Pre-Clinical Investigations in Syngeneic Rodent Models.

Haakonsen, B. S., et al. Sci Rep. 2017 Jun 2;7(1):2845. PMID: 28572631

Bispecific antibodies (bsAbs) were generated by fusing mouse IgG2a and rat IgG2b hybridomas, exploiting species-restricted heavy-light chain pairing and differential Protein A elution to increase yield (mean recovery 75.2%). The study evaluated mutations in rat IgG1, IgG2a, IgG2b, and IgG2c backbones, confirming their applicability. This approach simplifies purification and enhances the production of bsAbs for pre-clinical studies in syngeneic rodent models.

(Tags: function of Rat IgG2b Fc Protein; Rat IgG2b Fc Protein mouse dose range)

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Rat Fc protein (IgG2b), Rat IgG2b Fc region, Recombinant rtIgG2b Fc Protein

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BP4123: In Vivo Grade Recombinant Rat IgG2b Fc protein (rtIgG2b Fc)

References of Rat IgG2b Fc Protein