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Protein Modification Reagents

Chemical agents used to modify the amino acid side chains of proteins in order to alter their native charges, block or expose reactive binding sites, inactivate functional groups, and change functional groups to create targets for crosslinking and labeling.
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Search Within Results
Keyword Search:
2,146 – 2,160 of 5,667 results
2,146

Cayman Chemical Hydroxy-PEG2 AcId 250mg
SDP

A PEGylated building block

ENCOMPASS_PREFERRED
2,147

Abcam TNB, Yellow chromogenic standard for DTNB thiol quantification, 250MG

MW 199.19 Da, Purity =95%. TNB, Yellow chromogenic standard for DTNB thiol quantification. Achieve your results faster with highly validated, pure and trusted compounds.

The product is subject to the following: Abcam Restricted Use Statement

ENCOMPASS_PREFERRED
2,148

ABclonal Technology EP400 Rabbit pAb
SDP

Predicted to enable several functions, including ATP binding activity, ATP-dependent chromatin remodeler activity, and protein antigen binding activity. Involved in histone H2A acetylation and histone H4 acetylation. Part of NuA4 histone acetyltransferase complex and Swr1 complex.

ENCOMPASS_PREFERRED
2,149

Medchemexpress LLC NHS-PEG1-SS-PEG1-NHS | 1688598-83-5 | 98.0% | 436.41 | 50 MG
SDP

NHS-PEG1-SS-PEG1-NHS is a reversible linker designed for conjugating biomacromolecules with active small molecules.

  • Reversible linker
  • Designed for conjugating biomacromolecules with active small molecules
  • Suitable for use in proteins
  • Suitable for use in liposomes
  • Suitable for use in nanoparticles

ENCOMPASS_PREFERRED
2,150

Cayman Chemical DL-DIthIothreItol 1g
SDP

A reducing agent; has been used to stabilize thiols in a reduced state in various applications, including protein purification and enzymatic assays

ENCOMPASS_PREFERRED
2,151

Chemscene ChemScene | Azido-PEG2-CH2COOH | 250MG | CS-0028491 | 0.98 | 882518-90-3| MFCD24395877 | 189.17
SDP

ChemScene | Azido-PEG2-CH2COOH | 250MG | CS-0028491 | 0.98 | 882518-90-3| MFCD24395877 | 189.17

ENCOMPASS_PREFERRED
2,152

GENOVIS INC FABALACTICA FAB KIT MICROSPIN

FabALACTICA Fab kit Microspin

ENCOMPASS
2,153

AMBEED AZIDO-PEG12-ACID

NC3735972 AZIDO-PEG12-ACID

ENCOMPASS_PREFERRED
2,154

AMBEED AZIDO-PEG6-ACID

NC3735969 AZIDO-PEG6-ACID

ENCOMPASS_PREFERRED
2,155

Chemscene ChemScene | (Rac)-18:0 mPEG2000 PE | 1G | CS-0043315 | 0.98 | 147867-65-0| MFCD00240077 |
SDP

ChemScene | (Rac)-18:0 mPEG2000 PE | 1G | CS-0043315 | 0.98 | 147867-65-0| MFCD00240077 |

ENCOMPASS_PREFERRED
2,156

eMolecules​ 1807534-79-7 | Bromoacetamido-PEG3-acid | Broadpharm | MFCD28950780 | 342.186 | C11H20BrNO6 | 98.000 | OC(=O)CCOCCOCCOCCNC(=O)CBr | 500mg | 282987835

Bromoacetamido-PEG3-acid | Broadpharm | 1807534-79-7 | MFCD28950780 | 342.186 | C11H20BrNO6 | 98.000 | OC(=O)CCOCCOCCOCCNC(=O)CBr | 500mg | 282987835

ENCOMPASS_PREFERRED
2,157

Medchemexpress LLC Biotin-PEG2-alkyne | 2227450-68-0 | MFCD31922733 | 95.6% | 369.48 g/mol | C17H27N3O4S | 100 MG
SDP

Biotin-PEG2-alkyne is a short polyethylene glycol (PEG) linker functionalized with a biotin group and a terminal alkyne. It is designed for affinity-based capture and copper(I)-catalyzed azide-alkyne cycloaddition (click chemistry) conjugations in research applications.

  • Contains a biotin moiety for affinity capture.
  • Includes a terminal alkyne for copper(I)-catalyzed click chemistry.
  • Short PEG2 linker improves solubility and reduces steric hindrance.
  • Supplied as an off-white to light yellow solid.
  • Purity 95.6% by supplier specification.
  • Suitable for pull-down assays and biotinylation workflows.
  • Store powder at -20°C for long-term stability; 4°C for shorter storage.

ENCOMPASS_PREFERRED
2,158

Medchemexpress LLC t-Boc-N-amido-PEG5-Tos | 1404111-69-8 | MFCD34596623 | >98.0% | 491.6 | C22H37NO9S | 100 MG
SDP

t-Boc-N-amido-PEG5-Tos is a Boc-protected PEG5 linker bearing a tosylate leaving group and a Boc-protected amine. The hydrophilic PEG5 spacer improves aqueous solubility and provides a flexible handle for substitution and conjugation reactions, making this compound useful as a building block in medicinal chemistry, linker synthesis, and bioconjugation workflows.

  • Hydrophilic PEG5 spacer increases aqueous solubility.
  • Boc-protected amine permits controlled deprotection under acidic conditions.
  • Tosylate group acts as an efficient leaving group for nucleophilic substitution.
  • Useful as a linker or building block for conjugation and PEGylation.
  • Compatible with standard organic synthesis and bioconjugation protocols.

ENCOMPASS_PREFERRED
2,159

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000772948 NH2-PEG6-CH2CH2COOH 5G

ENCOMPASS_PREFERRED
2,160

eMolecules​ 2107273-00-5 | N-(azide-PEG3)-N'-(Ac-PEG3)-Cy7 | Broadpharm | MFCD29079412 | 792.420 | C43H58ClN5O7 | 97.000 | [Cl-].CC(=O)OCCOCCOCC[N+]1=C(\C=C\C=C\C=C\C=C2\N(CCOCCOCCOCCN=[N+]=[N-])c3ccccc3C2(C)C)C(C)(C)c2ccccc12 | 10mg | 550804282

N-(azide-PEG3)-N'-(Ac-PEG3)-Cy7 | Broadpharm | 2107273-00-5 | MFCD29079412 | 792.420 | C43H58ClN5O7 | 97.000 | [Cl-].CC(=O)OCCOCCOCC[N+]1=C(\C=C\C=C\C=C\C=C2\N(CCOCCOCCOCCN=[N+]=[N-])c3ccccc3C2(C)C)C(C)(C)c2ccccc12 | 10mg | 550804282

ENCOMPASS_PREFERRED