Enhanced Diagnostic Tools
Bio-Synthesis provides custom biomolecule immobilization of inorganic nano or macroparticles to be used in applications such as ligand purification, magnetic resonance, fluorescence imaging, cell targeting, diagnostic assay and drug delivery. Using proprietary coating
technologies, we offer exceptionally low background, consistent quality and reproducibility.
We custom design and cross link biomolecules onto various solid media. We can link biomolecules such as antibodies and their fragments, proteins (soluble and membrane proteins), enzymes, nucleic acids and their analogs, peptides, peptidomimetics, fluorescent compounds, biotin and avidin/streptavidin onto nano or macroparticles such as: glass, plates, nitrocellulose membranes, polystyrene, dextran gels, resins, nanogold, nanosphere, nanocrystal, microsphere, magnetic or luminex beads and qDot.
To obtain further information regarding custom bioconjugation, contact our National Customer Services Center at 800.227.0627 or contact us online with each inquiry to assist in meeting customer specifications.
Can’t find the type of service you need? Don’t worry. We have provided numerous bioconjugation services that extend beyond the described service portfolio. Simply contact us with your detailed project descriptions. In most cases, we can accommodate your bioconjugation needs!
This service is for conjugating biopolymer to on to solid supports using a heterobifunctional crosslinker.
Price varies based on the project specifications. List price is for reference only. Our service includes materials and labor for conjugation only!
Price does not include the cost of biopolymer synthesis and, if deemed necessary, biopolymer modification to introduce additional functional groups, extra
linkers, and/or spacers. Please contact us for a quote.
coupling of preactivated small molecules and biomolecules with chemical reactive groups such as amine, thiol, carboxylate, hydroxyl, aldehyde and
ketone, active hydrogen, photo-chemical and cycloaddition reactions, zero-length cross-linking, homobifunctional, heterobifunctional, or multifunctional cross-linking chemistries,
denrimer and dendrons and cleavable regent systems.
Some commonly used cross-linking reagents include:
After standard desalting or purification, a small percent of heterogeneous products containing single or multi-site conjugate per molecule may exist.
All custom synthesis of biomolecule and bioconjugation services are manufactured under strict quality control processes. Bio-Synthesis is committed to Total Quality Management (TQM) to assure customers' complete satisfaction. After immobilization of the biomolecules, a stringent wash and blocking of unreacted sites. Assay or determination of labeling efficiency can be determined for an additional fee.
Bio-Synthesis can assist s customers introduce funtional group or modified their exisit biopolymers such as native protein, oligos peptides or commerically available synthetic compounds to be ready for conjugation with other biopolymer.
User-supplied, non-commercial small or macromolecule should be sufficiently pure (≥95% pure). Please provide the QC data (typically HPLC, MS, ESI or NMR data etc.) and MSDS (if any) along with your compound. We can assist with the purification and acquisition of analytical data. These compounds must contain functional groups that can be targeted for crosslinking including carboxylate groups, primary amine groups, aldehyde/keto residues, hydroxyl, hydrazine, hydrazide, aminoxy, saccharide /glycan groups or thiol reactive functional group(s). Coupling also can be nonselective using a photoreactive phenyl azide cross inker. If necessary, we can also assist with the creation and activation of specific functionalities. Any sample supplied by the client requires a quality check by our analytical team to ensure sample quality prior conjugation.
Commercially available small molecules can be supplied by customers or ordered through Bio-Synthesis. Common small molecules such as common fluorescent dyes, biotin-NHS and other hetero-bifunctional cross-linkers are available at Bio-Synthesis. For in stock compounds, Bio-Synthesis will charge customers only the amount needed for conjugation. If the small molecules are to be purchased separately, the cost of acquiring this material will be added to the invoice along with a $50 administration charge per order.
We can custom synthesize small molecules either in house. A quotation will be prepared for such syntheses.
DNA, RNA and nucleic acid analogs such as BNA and other base analogs can be synthesized in-house at Bio-Synthesis, followed by subsequent conjugation through amino, thiol, aldehyde, azide, carobxyl or 5'-phosphate modification. Oligos supplied by the customer should be HPLC or gel purified (>90% pure). Please provide the QC data needed for purity assessment. Extra charges may apply for analyzing the starting materials at Bio-Synthesis.
Peptide s or protein can synthesize or express in-house at Bio-Synthesis. We label or conjugate peptides through N-terminal, C-terminal or internal side chain of an amino acids. Peptides supplied by the customer should be HPLC purified (>90% pure) and should contain a single modification site. We can make any standard peptides with functional groups incorporated through peptide synthesis. Please provide the peptide sequence of the desired peptide on the order form.
Commercial antibodies can be supplied by customers or ordered through Bio-Synthesis with an additional fee plus cost of antibody. Non-commercial biopolymers supplied by customers should be affinity purified. Please provide gel electrophoresis data along with your antibody. Bio-Synthesis also assist customer with antibody production, purification, modification, fragmentation prior to any cross linking reaction.
We offer post-synthetic modification of ligands to be immobilized on various solid supports, which allow the immobilization process to occur selectively in the presence of common functional groups, including amines, thiols, carboxylic acids, and alcohols. Bio-Synthesis offer functional group modification and derivatization;
See more information on Biomolecule Modification
Chemistry of Reactive Group used
Every chemical modification or conjugation process involves the reaction of one functional group with another, resulting in the formation of a covalent bond. The creation of bioconjugate reagents with spontaneously reactive, or selectively reactive functional groups, forms the basis for simple and reproducible crosslinking or tagging of target molecules. Our well-trained chemists assist clients from starting project scope collections to design, and determine appropriate homobiofunctional or heterobifunctional cross-linking chemistries, We have delivered thousands of custom conjugated biopolymers and are fully capable of meeting the ever-increasing bioconjugation needs in biological and drug discovery research. Hundreds of reaction systems have applied in our organic laboratories.
General Route for Immobilization
Cross-linking Strategies for Immobilization of Protein
Cross-linking strategies for Immobilization of oligonucleotides: DNA, RNA, BNA and other base analogs
Bio-Synthesis is committed to Total Quality Management (TQM) to assure customers' complete satisfaction. MS and HPLC analyses are performed following the completion of biopolymer synthesis, purification and QC (quality control). QA (quality assurance) procedures are also followed independently to double guarantee the high quality of every delivered peptide. Bio-Synthesis is complient with TQM (Total Quality Management) standards.
Visit our literature vaults for more references and citings.
For us to better understand your customized project, please complete our Bioconjugation Service Questionnaire. The more our chemists understand your project needs, the more accurate feedback we will be able to provide you. Provide us with your project details will enable to us to recommend the best reagents to use for your project. The most useful and readily available tools for bioconjugation projects are cross-linking reagents. A large number of cross-linkers, also known as bifunctional reagents, have been developed. There are several ways to classify the cross-linkers, such as the type of reactive group, hydrophobicity or hydrophilicity, and the length of the spacer between reactive groups. Other factors to consider are whether the two reactive groups are the same or different (for example, heterobifunctional or homobifunctional reagents), whether the spacer is cleavable, and whether the reagents are membrane permeable or impermeable. The most accessible and abundant reactive groups in proteins are the ϵ-amino groups of lysine. Therefore, a large number of the most common cross-linkers are amino selective reagents, such as imidoesters, , sulfo-N-hydroxysuccinimide esters, and N-hydroxysuccinimide esters. Due to the high reactivity of the thiol group with N-ethylmaleimide, iodoacetate and a-halocarbonyl compounds, new cross-linkers have been developed that contain maleimide and a-carbonyl moieties. Usually, N-alkylmaleimides aremore stable than their N-aryl counterparts.
In addition to the reactive groups on the cross-linkers, a wide variety of connectors and spacer arms have also been developed. The nature and length of the spacer arm play an important role in the functionality. Longer spacer arms are generally more effective when coupling large proteins or those with sterically protected reactive side-chains. Other important considerations are the hydrophobicity, hydrophilicity, and the conformational flexibility. Long aliphatic chains generally fold on themselves when in an aqueous environment, which makes the actual distance spanned by such linker arms less than expected. Instead, spacers that contain more rigid structures (for example, aromatic groups or cycloalkanes) should be used. These structures, however, tend to be very hydrophobic which could significantly decrease the solubility of the modified molecules or even modify some of their properties. In such cases, it is recommended to choose a spacer that contains an alkylether (PEO) chain. Bio-Synthesis offers several cross-linkers with PEO chains, such as thiol-binding homobifunctional reagents, heterobifunctional based, and their derivatives.
Within 3-5 days upon receiving your project scope, we will provide you an appropriate quotation. An order can be placed with PO (Purchase Order) or major credit cards ( ). Your credit card will be billed under Bio-Synthesis, Inc.