Where to Buy Fc-Tagged Recombinant Proteins for Research

You can buy Fc-tagged recombinant proteins for research from Beta LifeScience, which supplies catalog Fc-fusion proteins and offers custom protein production for targets requiring a particular species, sequence range, Fc orientation, purity, formulation or endotoxin level. Before requesting a quote, match the protein’s target, expression system, Fc format, sequence and quality-control specifications with your intended assay.

Beta LifeScience offers Fc-tagged proteins for immune-checkpoint research, antibody development, receptor–ligand studies, ELISA, SPR, BLI and cell-based applications. Researchers can review available catalog proteins or submit a project for evaluation when a standard product does not meet their requirements.

Quick Buying Guide

Before selecting an Fc-tagged recombinant protein, confirm:

• Target protein and species
• Full-length protein or extracellular-domain construct
• N-terminal or C-terminal Fc orientation
• Fc species and isotype
• Expression system
• Protein purity
• Endotoxin level
• Biological-activity data
• Formulation and storage conditions
• Required quantity and availability
• Supporting QC documentation
• Compatibility with the intended assay

For binding and functional experiments, do not choose a protein using purity alone. The sequence range, folding, Fc orientation, expression host, activity testing and formulation can also influence experimental performance.

Fc-Tagged Recombinant Proteins Available from Beta LifeScience

Beta LifeScience offers Fc-tagged proteins representing immune checkpoints, cytokine receptors, cell-therapy targets and signaling proteins. Product names and CTAs below are linked directly to their respective product pages.

Product specifications and availability may change. Review the current product page and formal quotation to confirm sequence range, purity, endotoxin level, biological activity, formulation, quantity and delivery requirements.

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How to Select the Right Fc-Tagged Protein

The right Fc-fusion protein is the one that matches the biological target and technical requirements of your assay. Use the following criteria to narrow the available options.

1. Match the Target and Species

Start with the target and species used in your experimental model. Human Fc-tagged proteins are commonly selected for human-target studies, while mouse and cynomolgus proteins can support animal-model, cross-reactivity and preclinical research. Species selection is particularly important for receptor–ligand interactions and antibody screening because sequence differences can influence binding. Confirm the accession number and expressed sequence rather than relying only on the target name.

2. Check the Expressed Sequence

Many soluble Fc-tagged proteins contain the extracellular domain of a receptor rather than its full native sequence. This construct design removes the transmembrane region while retaining a soluble target domain for binding studies.

Before ordering, verify:

• Expression range
• Extracellular-domain boundaries
• Signal peptide inclusion or removal
• Native protein domains retained in the construct
• Fc position
• Any linker between the target and Fc region

A suitable construct should retain the region required for the intended ligand, antibody or receptor interaction.

3. Confirm the Fc Format and Orientation

Fc tags are commonly fused to the C-terminus, but the appropriate orientation depends on the target’s structure and binding site. A C-terminal Fc tag may work well for many extracellular receptor domains, while another target may require an alternative orientation to reduce interference with a functional region.

The Fc species and isotype also matter. Human IgG1 Fc is widely used, but researchers should confirm compatibility with detection antibodies, Protein A or Protein G reagents, assay surfaces and Fc-receptor-containing samples. If the available catalog construct does not match the required design, consider custom protein expression.

4. Review the Expression System

The expression host can affect folding, disulfide-bond formation, glycosylation and biological function. Many extracellular mammalian proteins are produced in mammalian cells because these systems support eukaryotic folding and post-translational processing.

Beta LifeScience’s custom production platforms include:

• E. coli
• Yeast
• Baculovirus–insect cells
• Mammalian cells

Host selection should be based on the protein’s structural requirements, intended application, required yield, cost and desired post-translational modifications.

5. Evaluate Purity and Endotoxin Specifications

Purity is frequently evaluated using SDS-PAGE, but the required level depends on the experiment. Binding assays, antibody screening and cell-based studies may have different quality requirements. Endotoxin is especially important when an Fc-tagged protein will be used with immune cells or other endotoxin-sensitive systems. Several Beta LifeScience Fc-tagged catalog products list endotoxin levels below 1 EU/µg. Researchers requiring a lower limit should state the exact specification when submitting an inquiry.

Confirm both the numerical requirement and the method used to determine it.

6. Check Biological-Activity Data

A high-purity result does not independently confirm functional activity. If the experiment depends on a defined interaction, review whether activity was evaluated using:

• ELISA
• SPR
• BLI
• Cell-based assays
• Receptor-binding assays
• Ligand-binding assays

Some catalog proteins are listed as biologically active, while others state that activity was not tested or that supporting information is available on request. Confirm the available activity data before placing the order.

7. Review Formulation and Storage

Protein formulation can affect solubility, stability, immobilization and assay background. Review whether the product is supplied as a liquid or lyophilized powder and check the buffer components before use.

Important details include:

• Buffer composition
• pH
• Salts and stabilizers
• Carrier proteins
• Preservatives
• Reconstitution instructions
• Recommended storage temperature
• Freeze–thaw guidance

For sensitive assay platforms, request a formulation compatible with the downstream workflow.

Choosing an Fc-Tagged Protein by Application

The intended application should be included in the quotation request. This helps determine whether a catalog protein is suitable or whether a custom construct would provide a closer technical match.

Catalog or Custom Fc-Tagged Protein?

A catalog Fc-tagged protein is usually the practical option when the available species, sequence range, tag orientation, formulation and QC specifications match the project. It also allows researchers to review defined product information before submitting an inquiry.

Custom Fc-fusion production is more appropriate when you require:

• A target not available in the catalog
• A different species
• A specific sequence or domain
• Mutant or variant protein
• N-terminal instead of C-terminal Fc
• A particular Fc species or isotype
• Fc mutations
• A custom linker
• Lower endotoxin
• Alternative formulation
• Additional functional testing
• Bulk or scale-up production

Beta LifeScience provides custom protein expression and purification from gene synthesis through production and QC. Researchers can submit the target sequence and technical requirements through the project evaluation form.

Why Source Fc-Tagged Recombinant Proteins from Beta LifeScience?

Beta LifeScience combines a broad recombinant-protein catalog with project-specific protein production. This allows researchers to begin with an available Fc-tagged product and move to custom production when a different construct, scale or quality specification is needed.

Commercial and technical options include:

• Online inquiry and project-specific quotation support
• Worldwide shipping through established courier services
• Technical assistance for product selection and project requirements
• Multiple recombinant protein expression systems
• One-stop service from gene synthesis through expression and purification
• Small-scale, high-throughput and large-scale production
• Customization of endotoxin level
• Liquid or lyophilized formulation options
• Preferred affinity-tag selection
• Custom functional sequence range
• Bulk-order and custom-production support

Beta LifeScience also states a “No proteins, No payment” guarantee for its custom protein production service. Project eligibility, technical scope and guarantee conditions should be confirmed in the formal quotation. These options are particularly useful when an experimental workflow requires more than a standard catalog specification.

Information to Include in Your Quote Request

Providing complete project information can make product evaluation and quotation more efficient. Include:

• Target or gene name
• Species
• Accession number
• Required sequence range
• Preferred expression host
• N-terminal or C-terminal Fc orientation
• Fc species and isotype
• Required quantity
• Minimum purity
• Maximum endotoxin level
• Liquid or lyophilized formulation
• Intended application
• Required activity testing
• Desired QC documentation
• Delivery requirements

If the construct design has not been finalized, provide the protein sequence and intended application so the technical team can evaluate available options.

FAQs

Where can I buy Fc-tagged recombinant proteins?

Beta LifeScience supplies catalog Fc-tagged recombinant proteins and offers custom Fc-fusion production. Researchers can browse recombinant proteins or submit an online inquiry for pricing and availability.

What is an Fc-tagged recombinant protein?

An Fc-tagged recombinant protein is a target protein or protein domain fused to the Fc region of an immunoglobulin. The Fc fusion can support purification, detection, immobilization and dimerization, depending on the construct and application.

Are Fc-tagged proteins suitable for SPR and BLI?

Fc-tagged proteins can be used in SPR and BLI when the construct, buffer, purity, immobilization method and activity match the assay. Confirm Fc orientation, functional binding and aggregation-related requirements before ordering.

Should I choose an N-terminal or C-terminal Fc tag?

The appropriate position depends on the target structure and location of its functional binding site. C-terminal Fc formats are common for soluble extracellular domains, but custom orientation may be needed if the Fc region could interfere with binding.

Can Beta LifeScience produce a custom Fc-fusion protein?

Yes. Beta LifeScience offers custom recombinant protein expression using bacterial, yeast, insect and mammalian systems. Projects can include customized sequence range, tag, formulation, endotoxin requirements, production scale and QC testing.

Request an Fc-Tagged Protein Quote

Beta LifeScience supplies catalog and custom Fc-tagged recombinant proteins for binding assays, antibody research, ELISA, SPR, BLI, immuno-oncology and cell-based studies. Browse the available recombinant protein catalog or submit your target species, sequence, Fc orientation, required quantity, purity, endotoxin specification, formulation and intended application for a project-specific evaluation.

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