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Bioclone/BcMag™ One-Step Antibody Purification Kit/10 ml/EB102
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Bioclone/BcMag™ One-Step Antibody Purification Kit/10 ml/EB102
品牌 / 
Bioclone Inc
货号 / 
EB102
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数    量:
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4000-520-616

BcMag™ One-Step Antibody Purification Kit is specifically designed for rapid small scale high-throughput purification of a variety of IgG species from serums such as humans, mice, rats, rabbits, goats, horses, guinea pig, pigs, hamsters, and donkeys. Unlike traditional bind-wash-elute affinity procedures, BcMag™ One-Step Antibody Purification Kit separates antibodies from serum by eliminating non-relevant proteins frequently present in large concentrations. The One-Step Antibody Purification beads bind non-antibody serum proteins such as albumin and transferrin, allowing the antibody to flow through in a moderate buffer ideal for storage and downstream uses. If the serum sample is not hemolyzed, it can be applied straight to the beads without the necessity for ammonium sulfate precipitation.

The One-Step Antibody Purification kit addresses the shortcomings of the commonly utilized immobilized Protein A and Protein G purification methods. IgG species and subclasses are selectively bound using Protein A and Protein G affinity techniques. The technique is often time-consuming and labor-intensive, requiring harsh elution conditions to disrupt the affinity connection. The purified antibody frequently requires dialysis or desalting before storage or use in downstream applications. The One-Step Antibody Purification technique does not require an elution step and instead employs a moderate purification buffer at physiological pH. Furthermore, because the purified antibody is in a buffer free of primary amines, it can be used directly in amine-reactive conjugation chemistries.

Magnetic resins have significant advantages over traditional chromatography, such as a column or non-magnetic resin. The magnetic bead-based format enables rapid high-yield processing of 96 samples in about 20 minutes, achieving more than 80% purities and recoveries of more than 90% for various IgG species. When using column-based technologies, processing multiple samples in academic research labs may necessitate a significant quantity of hand pipetting. This pipetting can discourage differences in the yield of target biomolecules between experiments and people. Staff and students may require extensive training and practice to produce constant protein yields. It is due to the numerous benefits of magnetic resins, such as their ease of use, rapid experimental protocols, suitability, and convenience for high-throughput automated and miniaturized processing.

Feature and Benefits

Efficient – recovery exceeds 90%, and purity exceeds 85%

Fast purification – One-Step and one-step high-throughput procedure

Convenient – no columns, filters, or a laborious repeat of pipetting or centrifugation

Amine – free buffer does not require removal or neutralization

Robust – effective for IgG subclasses that bind poorly to Protein A or G

Gentle – No harsh antibody elution conditions helps retain IgG activity

Regenerable – beads can be renewed and used for up to 3 purifications

Workflow

1.

Add magnetic beads to the serum.

2.

Mix the sample by pipetting up and down 25 times (one minute) or by vortex mixer.

3.

Magnetic separation of the non-antibody serum protein-bound beads from the pure antibody.

3.

Transfer the supernatant to a fresh tube.

Workflow of one-minute antibody purification

PROTOCOL

Note:

The following protocol is an example. The beads and sample volume can be rational Scale-up (or down).

Use 3μl of serum for every 40μl of beads. Impurities will result from inadequate bead use. Using too many beads may decrease the desired antibody’s yield. IgG levels in serum are usually 10-15mg/ml; however, results may vary depending on species and sample preparation.

Transferrin can be found in samples purified using beads from various species, including mouse and rat. Transferrin from these species has various properties and does not react with the beads like transferrin from other species does. Before purification, execute an ammonium sulfate precipitation to lower the presence of transferrin in the flow-through.

Equipment

Item

Magnetic Rack for centrifuge tube


** Based on sample volume, the user can choose one of the following magnetic Racks

Source

•  BcMag™ Rack-2 for holding two individual 1.5 ml centrifuge tubes (Bioclone, Cat. No. MS-01)

•  BcMag™ Rack-6 for holding six individual 1.5 ml centrifuge tubes (Bioclone, Cat. No. MS-02)

•  BcMag™ Rack-24 for holding twenty-four individual 1.5-2.0 ml centrifuge tubes (Bioclone, Cat. No. MS-03)

•  BcMag™ Rack-50 for holding one 50 ml centrifuge tube, one 15 ml centrifuge tube, and four individual 1.5 ml centrifuge tubes (Bioclone, Cat. No. MS-04)

Item

BcMag™ 96-well Plate Magnetic Rack.

Source

•  BcMa™ 96-well Plate Magnetic Rack (side-pull) compatible with 96-well PCR plate and 96-well microplate or other compatible Racks (Bioclone, Cat. No. MS-05)

Item

Adjustable Single and Multichannel Pipettes

Item

Centrifuge with Swinging Bucket

Addition items are required if using 96-well PCR plates / tubes

Vortex Mixer

** The user can also use other compatible vortex mixers. However, the Time and speed should be optimized, and the mixer should be: Orbit ≥1.5 mm-4 mm, Speed ≥ 2000 rpm

Eppendorf™ MixMate™

Eppendorf, Cat. No. 5353000529

Tube Holder PCR 96

Eppendorf, Cat. No. 022674005

Tube Holder 1.5/2.0 mL, for 24 × 1.5 mL or 2.0 mL

Eppendorf, Cat. No. 022674048

Smart Mixer, Multi Shaker

BenchTop Lab Systems, Cat. No. 5353000529

1.5/2.0 mL centrifuge tube

96-well PCR Plates or 8-Strip PCR Tubes

PCR plates/tubes

** IMPORTANT! If using other tubes or PCR plates, make sure that the well diameter at the bottom of the conical section of PCR Tubes or PCR plates must be ≥2.5mm.

Addition items are required if using 96-well micro-plates

Fisher Scientific™ Microplate Advanced Vortex Mixers

Fisher, Cat. No. 02-216-101

OHAUS Microplate Vortex Mixers

OHAUS, Cat. No. 30392160

Vortex Mixer

** The user can also use other compatible vortex mixers. However, the Time and speed should be optimized, and the mixer should be: Orbit ≥1.5 mm-4 mm, Speed ≥ 800 rpm

Clear Flat-Bottom Non-Binding Assay Microplates

Items

Magnetic Rack for centrifuge tube

** Based on sample volume, the user can choose one of the following magnetic Racks

Source

BcMag™ Rack-2 for holding two individual 1.5 ml centrifuge tubes (Bioclone, Cat. No. MS-01)

BcMag™ Rack-6 for holding six individual 1.5 ml centrifuge tubes (Bioclone, Cat. No. MS-02)

BcMag™ Rack-24 for holding twenty-four individual 1.5-2.0 ml centrifuge tubes (Bioclone, Cat. No. MS-03)

BcMag™ Rack-50 for holding one 50 ml centrifuge tube, one 15 ml centrifuge tube, and four individual 1.5 ml centrifuge tubes (Bioclone, Cat. No. MS-04)

BcMag™ 96-well Plate Magnetic Rack

BcMa™ 96-well Plate Magnetic Rack (side-pull) compatible with 96-well PCR plate and 96-well microplate or other compatible Racks (Bioclone, Cat. No. MS-05)

Adjustable Single and Multichannel Pipettes

Centrifuge with Swinging Bucket

Addition items are required if using 96-well PCR plates/tubes

Vortex Mixer

** The user can also use other compatible vortex mixers. However, the Time and Speed should be optimized, and the mixer should be: Orbit ≥1.5 mm-4 mm, Speed ≥ 2000 rpm

Eppendorf™ MixMate™

Tube Holder PCR 96

Tube Holder 1.5/2.0 mL, for 24 × 1.5 mL or 2.0 mL

Smart Mixer, Multi Shaker

Eppendorf, Cat. No. 5353000529

Eppendorf, Cat. No. 022674005

Eppendorf, Cat. No. 022674048

BenchTop Lab Systems, Cat. No. 5353000529

Eppendorf™ MixMate™

Tube Holder PCR 96

Tube Holder 1.5/2.0 mL, for 24 × 1.5 mL or 2.0 mL

Smart Mixer, Multi Shaker
 

Eppendorf, Cat. No. 5353000529

Eppendorf, Cat. No. 022674005

Eppendorf, Cat. No. 022674048
 

BenchTop Lab Systems, Cat. No. 5353000529

1.5/2.0 mL centrifuge tube

96-well PCR Plates or 8-Strip PCR Tubes

PCR plates/tubes

! IMPORTANT ! If using other tubes or PCR plates, make sure that the well diameter at the bottom of the conical section of PCR Tubes or PCR plates must be ≥2.5mm.

Addition items are required if using 96-well microplates

Fisher Scientific™ Microplate Advanced Vortex Mixers

Fisher, Cat. No. 02-216-101

OHAUS Microplate Vortex Mixers

OHAUS, Cat. No. 30392160

Vortex Mixer

** The user can also use other compatible vortex mixers. However, the Time and Speed should be optimized, and the mixer should be: Orbit ≥1.5 mm-4 mm, Speed ≥ 800 rpm

Clear Flat-bottom Non-Binding Assay Microplates

Procedure

! Important !

The following protocol is optimized for the efficient clean-up of the 3μl serum sample. The procedure may need to be optimized if an alternative reaction scale is used.

Shake or vortex the bottle to completely resuspend the magnetic beads before using.

Do not allow the magnetic beads to sit for more than two minutes before dispensing.

1.

Transfer 40μl beads to a new well of 96well PCR plate or 96-well microplates or 0.2ml PCR tube and add 3μl serum.

2.

Mix the beads with the sample by slowly pipetting up and down 25 times (one minute) or by vortex mixer for 5 minutes at 2000 rpm.

3.

Place the sample plate/ tube on the magnetic separation plate for 30 seconds or until the solution is clear.

4.

Transfer the supernatant to a clean plate /tube while the sample plate remains on the magnetic separation plate. The sample is ready for downstream applications.

Additional information

Beads regeneration

1.

If the bead has to be regenerated, add 50μL of 5M NaCl, and mix the beads with the sample by slowly pipetting up and down 25 times (one minute) or by vortex mixer 5 minutes at 2000 rpm. Place the sample plate/ tube on the magnetic separation plate for 30 seconds or until the solution is clear. Discard the supernatants.

2.

Repeat Step 1 five times.

3.

Resuspend the beads with 40μl of 25mM MES, PH6.5, and store at 4°C. The beads may be renewed three times without losing substantial selectivity.

Troubleshooting

Problem

The yield of the purified antibody is too low or undetectable

Probable Cause

Sample devoid of antibody

Suggestion

  • Ensure that the sample contains IgG by using another method, such as an ELISA or isotyping kit.

Problem

The yield of the purified antibody is too low or undetectable

Probable Cause

The antibody of interest bound to the beads

Suggestion

  • Ensure that the pH of the sample is between 6.5 and 7.0.

Problem

Observe multiple bands present on stained SDS-polyacrylamide gel

Probable Cause

The sample contains salts greater than 25mM, and/or the pH is not neutral.

Suggestion

  • Dialyze sample against a low-salt neutral buffer.
  • Make sure the pH of the sample is between 6.5 and 7.0.

Problem

A significant amount of antibodies was purified. However, no antibody of interest was found.

Probable Cause

The concentration of antibodies of interest is low.

Suggestion

  • Purify the antibody utilizing active affinity magnetic beads and a specific antigen.

Problem

Purified IgG is colored.

Probable Cause

A sample of serum is hemolyzed.

Suggestion

Elimination of Hemolysis
The following procedures can be used to decrease or eliminate hemolysis in serum samples.

  • Collect blood in the presence of an anticoagulant and centrifuged to remove red blood cells.
  • Collect blood with caution to avoid hemolysis.
  • Collect interstitial fluid instead of blood.

Problem

Probable Cause

Suggestion

The yield of the purified antibody is too low or undetectable

Sample devoid of antibody

  • Ensure that the sample contains IgG by using another method, such as an ELISA or isotyping kit.

The antibody of interest bound to the beads

  • Ensure that the pH of the sample is between 6.5 and 7.0.

Observe multiple bands present on stained SDS-polyacrylamide gel


The sample contains salts greater than 25mM, and/or the pH is not neutral.
 
  • Dialyze sample against a low-salt neutral buffer.
  • Make sure the pH of the sample is between 6.5 and 7.0.

A significant amount of antibodies was purified. However, no antibody of interest was found.


The concentration of antibodies of interest is low.
 
  • Purify the antibody utilizing active affinity magnetic beads and a specific antigen.

Purified IgG is colored.

A sample of serum is hemolyzed.

Elimination of Hemolysis
The following procedures can be used to decrease or eliminate hemolysis in serum samples.

  • Collect blood in the presence of an anticoagulant and centrifuged to remove red blood cells.
  • Collect blood with caution to avoid hemolysis.
  • Collect interstitial fluid instead of blood.

Learn More

Instruction Manual

MSDS

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