accessibility menu, dialog, popup

UserName
Viewing profile as user:

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.
Product Type 
  • (1)
  • (2)
  • (13)
  • (3)
  • (2)
  • (1)
  • (11)
  • (1)
  • (3)
  • (1)
  • (1)
  • (1)
  • (2)
  • (1)
  • (1)
  • (1)
  • (1)
  • (4)
  • (1)
  • (1)
  • (1)
  • (1)
  • (7)
  • (3)
  • (4)
  • (1)
  • (2)
  • (1)
  • (4)
  • (1)
  • (1)
  • (3)
  • (1)
  • (1)
  • (2)
  • (2)
  • (1)
  • (1)
  • (1)
  • (1)
  • (7)
  • (1)
  • (1)
  • (9)
  • (1)
  • (18)
  • (1)
  • (1)
  • (8)
  • (1)
  • (1)
  • (1)
  • (1)
  • (1)
  • (2)
  • (1)
  • (1)
  • (1)
  • (11)
  • (1)
  • (2)
  • (1)
Chemical Reactivity 
  • (5)
  • (16)
  • (2)
  • (4)
  • (1)
  • (5)
Spacer 
  • (9)
  • (5)
  • (6)
  • (4)
  • (1)
  • (2)
  • (5)
Crosslinker Type 
  • (4)
Molecular Weight (g/mol) 
  • (2)

Filtered Search Results

Products from some of our suppliers do not display in filtered search results. Please clear all filters to see these products.

Narrow Results

Narrow Results

category

special offers

  • (1)

brands

  • (7)
  • (10)
  • (74)
  • (1)
  • (9)
  • (2)
  • (8)
  • (4)
  • (1)
  • (1)
  • (7)
  • (5)
  • (2)
  • (7)
  • (1)
  • (101)
  • (8)
  • (3)
  • (13)
  • (1)
  • (7)
  • (1)
  • (48)
  • (1)
  • (4)
  • (1)
  • (2)
  • (1)
  • (7)
  • (1)
  • (3)
  • (35)
  • (6)
  • (1)
  • (1)
  • (276)
  • (3)
  • (5)
  • (208)
  • (8)
  • (2)
  • (2)
  • (37)
  • (7)
  • (1)
  • (1)
  • (2)
  • (1)
  • (61)
  • (3)
  • (1)
  • (1)
  • (3)
  • (4)
  • (6)
  • (4)
  • (756)
  • (1)
  • (9)
  • (1)
  • (3)
  • (3)
  • (1)
  • (3)
  • (4)
  • (1)
  • (9)
  • (5)
  • (8)
  • (1)
  • (1)
  • (1)
  • (1)
  • (11)
  • (7)
  • (1)
  • (6)
  • (2)
  • (9)
  • (11)
  • (2,273)
  • (2)
  • (1)
  • (61)
  • (3)
  • (6)
  • (8)
  • (14)
  • (6)
  • (2)
  • (45)
  • (7)
  • (3)
  • (1)
  • (5)
  • (1)
  • (1)
  • (19)
  • (1)
  • (1)
  • (2)
  • (32)
  • (4)
  • (1)
  • (8)
  • (2)
  • (1)
  • (1)
  • (1)
  • (3)
  • (152)
  • (20)
  • (2)
  • (22)
  • (1)
  • (21)
  • (4)
  • (2)
  • (7)
  • (69)
  • (20)
  • (27)
  • (1)
  • (1)
  • (7)
  • (1)
  • (1)
  • (1)
  • (67)
  • (2)
  • (1)
  • (2)
  • (54)
  • (1)
  • (4)

special interests

  • (10)
  • (43)
  • (1)
  • (3)
  • (3,132)

Product Type

  • (1)
  • (2)
  • (13)
  • (3)
  • (2)
  • (1)
  • (11)
  • (1)
  • (3)
  • (1)
  • (1)
  • (1)
  • (2)
  • (1)
  • (1)
  • (1)
  • (1)
  • (4)
  • (1)
  • (1)
  • (1)
  • (1)
  • (7)
  • (3)
  • (4)
  • (1)
  • (2)
  • (1)
  • (4)
  • (1)
  • (1)
  • (3)
  • (1)
  • (1)
  • (2)
  • (2)
  • (1)
  • (1)
  • (1)
  • (1)
  • (7)
  • (1)
  • (1)
  • (9)
  • (1)
  • (18)
  • (1)
  • (1)
  • (8)
  • (1)
  • (1)
  • (1)
  • (1)
  • (1)
  • (2)
  • (1)
  • (1)
  • (1)
  • (11)
  • (1)
  • (2)
  • (1)

Chemical Reactivity

  • (5)
  • (16)
  • (2)
  • (4)
  • (1)
  • (5)

Spacer

  • (9)
  • (5)
  • (6)
  • (4)
  • (1)
  • (2)
  • (5)

Crosslinker Type

  • (4)

Molecular Weight (g/mol)

  • (2)

Quantity

  • (1)

Search Within Results
Keyword Search:
3,196 – 3,210 of 5,664 results
3,196

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000744332 CY3-PEG2-ENDO-BCN 25MG

ENCOMPASS_PREFERRED
3,197

Medchemexpress LLC Tco-peg8-nhs ester | 2353409-95-5 | 95.0% | C32H54N2O14 | 10MG
SDP

TCO-PEG8-NHS ester is a PEG-based PROTAC linker with an N-hydroxysuccinimide (NHS) activated ester that enables efficient conjugation to primary amines. The molecule incorporates a trans-cyclooctene (TCO) moiety separated by an eight-unit PEG spacer to provide aqueous solubility and flexible spacing for bioconjugation and targeted protein degradation construct synthesis.

  • NHS-activated ester for efficient amide bond formation.
  • Eight-unit PEG spacer improves solubility and flexibility.
  • Provides a trans-cyclooctene (TCO) handle for click chemistry.
  • High reported purity (95.0%).
  • Supplied in small-mass packages suitable for research use.

ENCOMPASS_PREFERRED
3,198

eMolecules​ 2226472-38-2 | endo-BCN-PEG4-acid | Broadpharm | MFCD23704190 | 441.521 | C22H35NO8 | 97.000 | OC(=O)CCOCCOCCOCCOCCNC(=O)OC[C@@H]1[C@@H]2CCC#CCC[C@H]12 | 100mg | 204725189

endo-BCN-PEG4-acid | Broadpharm | 2226472-38-2 | MFCD23704190 | 441.521 | C22H35NO8 | 97.000 | OC(=O)CCOCCOCCOCCOCCNC(=O)OC[C@@H]1[C@@H]2CCC#CCC[C@H]12 | 100mg | 204725189

ENCOMPASS_PREFERRED
3,199

Medchemexpress LLC Azide-PEG5-Tos | 236754-49-7 | MFCD28505520 | 98.5% | 417.48 g/mol | C17H27N3O7S | 250 MG
SDP

Azide-PEG5-Tos is a cleavable five-unit polyethylene glycol (PEG5) linker bearing an azide functional group and a tosyl leaving group. It is used as a click-chemistry compatible linker and crosslinker for antibody-drug conjugates (ADCs) and other bioconjugation applications.

  • Cleavable five-unit PEG linker suitable for ADC synthesis.
  • Azide functional group enables CuAAC and strain-promoted cycloaddition.
  • High purity suitable for research applications.
  • Soluble in DMSO at ≥100 mg/mL.
  • Molecular weight 417.48 g/mol; chemical formula C17H27N3O7S.
  • Available in milligram to gram pack sizes, including 250 MG.

ENCOMPASS_PREFERRED
3,200

eMolecules​ 2055041-38-6 | Mal-PEG2-Val-Cit-PAB-OH | Broadpharm | MFCD29918233 | 618.688 | C29H42N6O9 | 0.000 | CC(C)[C@H](NC(=O)CCOCCOCCN1C(=O)C=CC1=O)C(=O)N[C@@H](CCCNC(N)=O)C(=O)Nc1ccc(CO)cc1 | 50mg | 368397818

Mal-PEG2-Val-Cit-PAB-OH | Broadpharm | 2055041-38-6 | MFCD29918233 | 618.688 | C29H42N6O9 | 0.000 | CC(C)[C@H](NC(=O)CCOCCOCCN1C(=O)C=CC1=O)C(=O)N[C@@H](CCCNC(N)=O)C(=O)Nc1ccc(CO)cc1 | 50mg | 368397818

ENCOMPASS_PREFERRED
3,201

eMolecules​ Cbz-N-amido-PEG15-amine | BroadpharmMFCD30723279 | 855.029 | C40H74N2O17 | 97.000 | NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCNC(=O)OCc1ccccc1 | 1g | 340376868

Cbz-N-amido-PEG15-amine | BroadpharmMFCD30723279 | 855.029 | C40H74N2O17 | 97.000 | NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCNC(=O)OCc1ccccc1 | 1g | 340376868

ENCOMPASS_PREFERRED
3,202

Medchemexpress LLC M-PEG15-NHS ester | 00-00-0 | 98.0% | C39H73NO20 | 10MG
SDP

m-PEG15-NHS ester is a methoxy-terminated polyethylene glycol (PEG) N-hydroxysuccinimide ester used as a hydrophilic linker in PROTAC synthesis and bioconjugation. It supplies an amine-reactive NHS group for covalent coupling to primary amines and a PEG15 spacer to improve solubility, flexibility, and distance between conjugated moieties.

  • Provides an NHS ester for efficient amine coupling.
  • Contains a methoxy-terminated PEG15 spacer to increase solubility.
  • High purity (98.0%) suitable for research applications.
  • Storage recommended at -20°C, sealed and protected from moisture and light.
  • Available in multiple package sizes to support different scales of synthesis.

ENCOMPASS_PREFERRED
3,203

eMolecules​ 2222687-71-8 | Biotin-PEG4-Picolyl azide | Broadpharm | MFCD29052186 | 622.740 | C27H42N8O7S | 95.000 | [N-]=[N+]=NCc1ccc(NC(=O)CCOCCOCCOCCOCCNC(=O)CCCC[C@@H]2SC[C@@H]3NC(=O)N[C@H]23)cn1 | 5mg | 296213266

Biotin-PEG4-Picolyl azide | Broadpharm | 2222687-71-8 | MFCD29052186 | 622.740 | C27H42N8O7S | 95.000 | [N-]=[N+]=NCc1ccc(NC(=O)CCOCCOCCOCCOCCNC(=O)CCCC[C@@H]2SC[C@@H]3NC(=O)N[C@H]23)cn1 | 5mg | 296213266

ENCOMPASS_PREFERRED
3,204

Medchemexpress LLC N3-PEG3-VC-PAB-MMAF | 2757277-32-8 | 100.0% | 1352.62 g/mol | C66H105N13O17 | 10 MG
SDP

N3-PEG3-VC-PAB-MMAF is an azide-functional drug-linker conjugate used for antibody-drug conjugate (ADC) research and bioconjugation. It combines a PEG3-VC-PAB cleavable linker with the tubulin inhibitor MMAF, and is designed for click-chemistry attachment to alkyne or strained-alkyne partners.

  • Enables click chemistry conjugation via azide handle.
  • Contains a cleavable valine-citrulline-PAB linker for payload release.
  • Suitable for ADC linker-payload synthesis and site-specific attachment.
  • Solid, white to off-white material with high purity for research use.

ENCOMPASS_PREFERRED
3,205

eMolecules​ 518044-31-0 | Hydroxy-PEG3-CH2CO2tBu | Apollo Scientific | MFCD27977510 | 264.318 | C12H24O6 | 0.000 | CC(C)(C)OC(=O)COCCOCCOCCO | 1g | 591806870

Hydroxy-PEG3-CH2CO2tBu | Apollo Scientific | 518044-31-0 | MFCD27977510 | 264.318 | C12H24O6 | 0.000 | CC(C)(C)OC(=O)COCCOCCOCCO | 1g | 591806870

ENCOMPASS_PREFERRED
3,206

eMolecules​ 956348-61-1 | Propargyl-PEG24-amine | Broadpharm | MFCD30723251 | 1112.352 | C51H101NO24 | 98.000 | NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCC#C | 1g | 340376890

Propargyl-PEG24-amine | Broadpharm | 956348-61-1 | MFCD30723251 | 1112.352 | C51H101NO24 | 98.000 | NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCC#C | 1g | 340376890

ENCOMPASS_PREFERRED
3,207

eMolecules​ 2110448-97-8 | Gly-PEG3-amine, TFA salt | Broadpharm277.365 | C12H27N3O4 | 98.000 | NCCCOCCOCCOCCCNC(=O)CN | 250mg | 550804396

Gly-PEG3-amine, TFA salt | Broadpharm | 2110448-97-8277.365 | C12H27N3O4 | 98.000 | NCCCOCCOCCOCCCNC(=O)CN | 250mg | 550804396

ENCOMPASS_PREFERRED
3,208

Biolegend Cell-Vive™ GMP Recombinant Human FLT3L (carrier-free); Reactivity: Human; Apps: BA; Size: 500 μg

Cell-Vive™ GMP Recombinant Human FLT3L (carrier-free); Reactivity: Human; Apps: BA; Size: 500 μg

ENCOMPASS_PREFERRED
3,209

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000284633 N - CARBOXYETHYL LYS 5MG

ENCOMPASS_PREFERRED
3,210

Chemscene ChemScene | DL-dithiothreitol | 500G | CS-3035 | 0.98 | 578517| MFCD00004877 | 154.25
SDP

ChemScene | DL-dithiothreitol | 500G | CS-3035 | 0.98 | 578517| MFCD00004877 | 154.25

ENCOMPASS_PREFERRED