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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:
3,946 – 3,960 of 5,709 results
3,946

Medchemexpress LLC (S,R,S)-AHPC-PEG2-C4-Cl | 1835705-57-1 | MFCD31560480 | 98.2% | 651.26 g/mol | C32H47ClN4O6S | 2 G
SDP

A VHL ligand-linker conjugate used as a PROTAC building block; it incorporates the (S,R,S)-AHPC VHL ligand connected via a PEG2-C4 alkyl/ether linker with a terminal chloride and has been reported to induce degradation of GFP-HaloTag7 in cell-based assays.

  • Used as a building block for PROTAC synthesis and E3 ligase ligand-linker conjugates.
  • Contains a VHL-binding (S,R,S)-AHPC motif with a PEG2-C4 linker.
  • Reported to induce GFP-HaloTag7 degradation in cell assays.
  • Soluble in DMSO, water, and ethanol at approximately 50 mg/mL (may require ultrasonic).
  • Available in multiple package sizes, including a 2 g option.

ENCOMPASS_PREFERRED
3,947

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000756889 BN-PEG2-BR 500MG

ENCOMPASS_PREFERRED
3,948

PRECISE PEG LLC NH-BIS PEG2-PROPARGYL 5G

NC3714539 NH-BIS PEG2-PROPARGYL 5G

ENCOMPASS
3,949

BIOPHARM LABORATORIES LLC TCHNCL GRD BOVINE THROMBIN
SDP

NC2315542 TCHNCL GRD BOVINE THROMBIN

ENCOMPASS_PREFERRED
3,950

Broadpharm Iodoacetamido-PEG6-azide| 100mg| 1240737-77-2| Purity 98%

Iodoacetamido-PEG6-azide| 100mg| 1240737-77-2| Purity 98%

ENCOMPASS
3,951

CREATIVE PEGWORKS 4-ARM PEG-AZIDE MW 10K - 1G
SDP

NC2675404 4-ARM PEG-AZIDE MW 10K - 1G

ENCOMPASS
3,952

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000737602 DSPE-PEG-DBCO MW 50 10MG

ENCOMPASS_PREFERRED
3,953

Medchemexpress LLC Bis-PEG9-NHS ester 25mg | 1008402-79-6 | 708.71 | C30H48N2O17 | 25 MG
SDP

Bis-PEG9-NHS ester is a homobifunctional polyethylene glycol (PEG) linker bearing two N-hydroxysuccinimide (NHS) ester reactive groups. It is provided as a white powder for research use in bioconjugation and linker assembly workflows, offering a hydrophilic, flexible spacer for coupling to primary amines in proteins and small molecules.

  • Contains two NHS ester reactive groups for amine conjugation.
  • PEG9 spacer increases aqueous solubility and conformational flexibility.
  • Suitable for antibody-drug conjugate and PROTAC linker synthesis.
  • High purity appropriate for research applications.
  • Supplied in a small quantity format for small-scale reactions and method development.

ENCOMPASS_PREFERRED
3,954

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000745265 TCO-PEG6-AMINE 100MG

ENCOMPASS_PREFERRED
3,955

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000737503 DSPE-PEG-CY5 MW 200 1MG

ENCOMPASS_PREFERRED
3,956

eMolecules​ Broadpharm / Pomalidomide-PEG5-Azide / 100mg / 528284333 / BP-24497 / 98.000 / / [null] / 590.590 / C26H34N6O10

Broadpharm / Pomalidomide-PEG5-Azide / 100mg / 528284333 / BP-24497 / 98.000 / / [null] / 590.590 / C26H34N6O10

ENCOMPASS_PREFERRED
3,957

eMolecules​ Broadpharm / 13-(Azide-PEG9-ethylcarbamoyl)tridecanoic t-butyl ester / 50mg / 490840932 / BP-24394 / 98.000 / / [null] / 779.026 / C38H74N4O12

Broadpharm / 13-(Azide-PEG9-ethylcarbamoyl)tridecanoic t-butyl ester / 50mg / 490840932 / BP-24394 / 98.000 / / [null] / 779.026 / C38H74N4O12

ENCOMPASS_PREFERRED
3,958

CREATIVE PEGWORKS CHOLESTEROL-PEG-NHS MW 1K
SDP

NC1960265 CHOLESTEROL-PEG-NHS MW 1K

ENCOMPASS
3,959

eMolecules​ DBCO-PEG4-triethoxysilane | 2353410-02-1 | | 250mg

Broadpharm | DBCO-PEG4-triethoxysilane | 250mg | 550804542 | BP-24137 | 98.000 | 2353410-02-1 | | 755.981 | C39H57N3O10Si

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ENCOMPASS_PREFERRED
3,960

Broadpharm BROADPHARM

NC4013494 AZIDO PEG2 NHS ESTER 1G

ENCOMPASS