4A Biotech

What 4A Biotech does

4A Biotech (Suzhou 4A Biotech Biotechnology Co., Ltd. / 四正柏生物) is a privately held Chinese biotechnology company that has spent more than a decade building a catalog of immunology-focused research reagents, assay kits, and IVD raw materials, and selling them primarily to academic research institutions, IVD diagnostic manufacturers, and pharmaceutical/biotech laboratories in China. Its core technology platforms are flow cytometry (a catalog of 1,277+ conjugated and unconjugated antibodies covering CD markers and other targets across human, mouse, rat, and chicken), quantitative sandwich ELISA (400+ kit variants), and cell function detection (Annexin V apoptosis kits, PI and 7-AAD cell cycle kits, CCK-8, TUNEL, membrane potential, calcium assays). The company also sells IVD raw materials — antibody pairs, fluorescent dyes, streptavidin, TMB luminescent substrate, and BSA — to upstream diagnostic kit manufacturers, and offers UltraFection 2.0/3.0 transfection reagents and protein/antibody labeling kits as supporting cell-biology consumables.

The business model is a horizontal, catalog-driven reagent franchise sold through the company's own 4abio.com storefront, with additional reach via the BioMart third-party marketplace, QQ-based sales and customer support, and a LinkedIn corporate page. Revenue is generated from one-time sales of research reagents and IVD raw materials (one-time license model) and from fee-for-service experimental work including flow cytometry detection, CBA detection, custom ELISA/KIT development, real-time PCR, cell sorting, exosome and oxidative stress services, and, through a partnership with PEPperPRINT, peptide chip microarray services. Pricing is not publicly disclosed; quotes are obtained by contacting the company directly by phone (0512-65829739) or email ([email protected] / [email protected]). The company is led by founder and president Mike Luo, operates with 51–100 employees, and has no disclosed institutional investors, parent company, subsidiaries, M&A activity, patents, awards, or certifications. Distribution is domestic-only (single country, China) with no stated global footprint claim.

Name

4A Biotech

Legal name

Suzhou 4A Biotech Biotechnology Co., Ltd.

Website

https://4abio.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

51–100 employees

Short description

4A Biotech (Suzhou 4A Biotech Biotechnology Co., Ltd.) is a privately held Chinese supplier of immunology research reagents — including 1,277+ flow cytometry antibodies, 400+ ELISA kits, apoptosis and cell cycle kits, and IVD raw materials — sold to academic, IVD-manufacturing, and pharma research customers in China, with supporting fee-for-service experimental offerings.

Ownership category

akta.pro rank

Product category

Life Science Reagents

NAICS

In-Vitro Diagnostic Substance Manufacturing (325413)

SIC

In Vitro & In Vivo Diagnostic Substances (2835)

akta.pro primary industry

Reagents, Chemicals & Assay Kits (Buffers, Antibodies, ELISA, Enzymes) (HLAGAIAI)

akta.pro secondary industries

Biomarker Assay & Reagent Development (LDT/IVD assay design, antibodies/standards/controls) (HLAAAMAL), Specialty & Biomarker Laboratory Services (Immunoassays/Flow/Cytometry) (HLAGAEAB)

Keywords

• Immunology reagents
• Flow cytometry antibodies
• ELISA kits
• IVD raw materials
• Cell function assays

Headquarters

HQ city

Beijing

HQ country

China

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Research reagent products: Sale of immunology research reagents including flow cytometry antibodies, ELISA kits, apoptosis/cell cycle detection kits, and cell function assay reagents directly to customers
2. IVD raw materials: Supply of IVD (In-Vitro Diagnostics) raw materials including antibody pairs, fluorescent dyes, streptavidin, TMB luminescent substrates, and BSA for diagnostic kit manufacturers
3. Experimental services: Customized experimental services including flow cytometry detection, CBA detection, peptide chip services (PEPperPRINT), ELISA/KIT development, real-time PCR detection, cell sorting, and exosome-related技术服务

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

4A Biotech (Suzhou 4A Biotech Biotechnology Co., Ltd.) manufactures and sells immunology research reagents and assay kits, including flow cytometry antibodies (1,277+ products), ELISA kits (400+ varieties), apoptosis and cell cycle detection kits, UltraFection transfection reagents, and IVD raw materials (antibody pairs, fluorescent dyes, streptavidin, TMB substrates, BSA). The company also provides customized experimental services such as flow cytometry detection, CBA detection, peptide chip services, ELISA/KIT development, real-time PCR, cell sorting, and exosome-related services to research institutions, IVD manufacturers, and pharmaceutical/biotech companies.

Product overview

4A Biotech (Suzhou 4A Biotech Biotechnology Co., Ltd.) is a biotechnology company specializing in immunology products with over ten years of experience. The company offers a comprehensive portfolio of life science reagents organized into three main categories: (1) Core assay products including Flow Cytometry Antibodies (primary and secondary) with extensive CD marker coverage and multiple fluorochrome conjugates, ELISA Kits (400+ varieties for human, mouse, rat, and swine), Cell Cycle Analysis Kits (PI and 7-AAD based), and Apoptosis Assay Kits (Annexin V combinations with various fluorochromes); (2) Transfection and cell biology reagents including UltraFection 2.0/3.0 transfection reagents and CCK-8 cell counting kits; and (3) IVD raw materials for diagnostic manufacturing. The company also provides experimental services including flow cytometry, CBA detection, custom ELISA development, peptide chip services (via PEPperPRINT partnership), PCR, and cell sorting. The product portfolio emphasizes immunology-focused applications with flow cytometry and ELISA as the primary technology platforms.

Differentiator

Problem solved

Functional benefit

Products and services

• Flow Cytometry Antibodies
• ELISA Kits
• Apoptosis Assay Kits
• Cell Cycle Analysis Kit
• UltraFection Transfection Reagents
• Cell Counting Kit-8 (CCK-8)
• IVD Raw Materials
• Experimental Services

Quantifiable outcome

• 400+ validated ELISA kits available
• +1 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• PEPperPRINTcoreTechnology or Integration4A Biotech has officially launched PEPperPRINT peptide chip detection service, leveraging PEPperPRINT's unique peptide chip laser printing technology combined with 4A Biotech's 10+ years of immunology expertise to provide professional experimental services for domestic customers in China.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Sino Biological: Sino Biological is a Beijing-based biotech reagent manufacturer offering recombinant proteins, antibodies, ELISA kits, and flow cytometry reagents. It is one of the closest Chinese analogs to 4A Biotech, directly competing across the same immunology reagent catalog and customer base in China.
• Elabscience: Elabscience is a Wuhan-based life-science tools supplier specializing in ELISA kits, flow cytometry antibodies, and cell-based assay reagents. It overlaps heavily with 4A Biotech's core product lines and competes for the same Chinese academic and IVD customers.
• ABclonal Technology: ABclonal Technology is a Chinese biotech reagent company focused on polyclonal and monoclonal antibodies, ELISA kits, and IVD raw materials. Its product mix in immunology research reagents and IVD raw materials mirrors 4A Biotech's core catalog and customer segments.
• Miltenyi Biotec: Miltenyi Biotec is a European-based life-science tools provider specializing in cell sorting, flow cytometry, and immunology reagents. Its reagent and assay kit portfolio directly competes with 4A Biotech's flow cytometry antibody and cell function detection kits.
• Cell Signaling Technology (CST): CST is a US-based leader in antibodies and immunology reagents, including flow cytometry antibodies and ELISA kits. It competes with 4A Biotech in the research antibody and immunoassay space, particularly with Chinese universities and pharma customers sourcing globally.
• GenScript: GenScript is a Chinese-headquartered life-science tools and CRO provider offering antibodies, ELISA kits, cell therapy services, and IVD reagents. It is a comparable Chinese peer with overlapping product categories in immunology reagents and IVD raw materials.
• Bio-Techne (R&D Systems): Bio-Techne, through R&D Systems, is a leading global supplier of ELISA kits, cytokines, and flow cytometry reagents. Its catalog breadth in ELISA and immunology reagents makes it a direct functional competitor to 4A Biotech's flagship product categories.
• BioLegend (Revvity): BioLegend, now part of Revvity, is one of the largest flow cytometry antibody providers globally. Its portfolio of over 18,000 reagents overlaps directly with 4A Biotech's 1,277+ flow cytometry antibody catalog on key CD markers and immunology panels.

Broad incumbents

• Thermo Fisher Scientific (Invitrogen/eBioscience): Thermo Fisher Scientific, through its Invitrogen and eBioscience brands, is the dominant global supplier of flow cytometry antibodies, ELISA kits, and cell biology reagents. Its immunology tools portfolio overlaps with 4A Biotech's core offerings and sets the competitive benchmark in Chinese institutional procurement.
• BD Biosciences: BD Biosciences is a global incumbent in flow cytometry instruments and reagents, including clinical-grade antibodies and assay kits. Although a much larger, broader portfolio player, its clinical flow cytometry and immunology reagent lines directly overlap with 4A Biotech's flow antibody and apoptosis/cell-cycle kits business.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/13200251

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about 4A Biotech