Antibody Reformatting Service
Apart from canonical antibodies, which are around 150 kDa and composed of antigen-binding fragment (Fab) and Fc region, a wide range of antibody formats can be produced through recombinant expression technology. These reformatted antibodies can benefit certain applications by improving solubility, thermostability, immunogenicity, etc. For instance, scFv is used in medical imaging due to its increased tumor penetration. Bispecific antibodies, on the other hand, enable the binding of two target antigens at once, which has a great potential in cancer immunotherapy and drug delivery.
As an expert in producing recombinant antibodies, Bon Opus Biosciences offers a broad range of antibody reformatting services including scFv, Fab, bispecific. A variety of different antibody formats are available and can be tailored to customer requirements.
Canonical Antibody
Fab
scFv
Bispecific
(with or without Fc)
Antibody Fragments Expression and Purification
scFv (~25kDa)
•Mammalian cell: secretion/intracellular expression
•E. coli: soluble/refolded
•Tag: His, Fc, tag-free
•Linker design
Case Study: Mammalian-expressed, scFv, His-tag
Fab (~50kDa)
•Mammalian cell: secretion expression
•His-tag and tag-free
Case Study: Mammalian-expressed, Fab, His-tag
Nanobody/VHH (~15kDa)
•Mammalian secretion expression
•E. coli: soluble or refolded
•Tag: His and Fc
Case Study: VHH, His-tag (left) VHH, Fc-tag (right)
Bispecific Antibody Expression and Purification
Bispecific antibody is produced by assembling two Fab regions. It can be manufactured in several formats (with or without Fc) using different approaches.
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Gene synthesis and codon optimization of target Fab regions
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Cloning into expression vectors
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Transient expression in Expi293, ExpiCHO
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Purification
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Endotoxin removal as low as 0.1EU/mg (optional)
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QC analysis: SDS-PAGE, SEC-HPLC, endotoxin level test
Deliverable:
- Purified bispecific antibodies with customized QC standard
Turnaround time:
4 weeks plus shipping
Case Study
100mg ScFv Expression and Purification
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Expressed by Expi293 with VH-(GGGGS)3-VL-6x His and purified by Ni-NTA
SDS-PAGE and Anti-His WB image
M: Molecular weight marker
Me: Culture medium
FT: Flow-through
W: Washes
E: Elution
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Final Sample
SDS-PAGE
SEC-HPLC
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Deliverable: 100mg purified antibody, >SEC-HPLC 99% purity, endotoxin < 0.1EU/mg
Bispecific Antibody Expression and Purification
Antibody properties: Human IgG4, Human Kappa Light Chain
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Gene synthesis of two VH and one VL regions
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Cloning into premade Fc vectors (contains one chimeric Fc*)
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Co-expression with three constructs in Expi293
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Purification by MabSelect SuRe LX and pH gradient elution
1st Mab Select Sure LX Purification
Analytic SEC-HPLC (Elution sample)
2nd CIEX Purification
QC of final sample (desired heterodimer)
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Deliverable: Purified bispecific antibody, SEC-HPLC >99% purity
Our mission and core values at Bon Opus Biosciences give us the upper hand in biotechnology partnerships and services. We feature the most diverse range of expressions and testing formats to create an environment built on trust and collaboration throughout our superior services. Each partnership is backed by affordability, transparency, and proactive methodology, with a commitment to superior Fab and scFv antibody production. Our team of highly educated and experienced in-house scientists performs a comprehensive analysis to ensure the partnership remains collaborative, offering each of our unique clients the capability of receiving exceptional antibody reformatting designed with their distinct needs at the forefront.
Our distinct and innovative approach equips us with the opportunity to provide variable antibody expressions that serve immunotherapy, pharmaceutical deliverables, medical imaging, and many other communities. We are the industry-leading experts in recombinant proteins and antibodies, and our compact operation allows us to craft state-of-the-art experiences through our partnerships. To learn more about the distinct services and innovative antibody reformatting capabilities, fill out our quick online contact form. A trusted member of Bon Opus Biosciences will be in touch with you shortly.