Amino Acids

Organic compounds composed of a central carbon atom, a carboxyl group, an amino group, and a unique side chain; precursors to other molecules including proteins, hormones, and neurotransmitters.

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5,071 – 5,085 of 36,139 results

5,071

Medchemexpress LLC Val-cit-PAB-OH | 159857-79-1 | MFCD 22381209 | 99.6% | 379.45 g/mol | C18H29N5O4 | 5 G

Val-cit-PAB-OH is a protease-cleavable antibody-drug conjugate (ADC) linker that combines a valine-citrulline dipeptide with a para-aminobenzyl (PAB) self-immolative spacer. It is designed to release cytotoxic payloads inside target cells following lysosomal protease cleavage, and is supplied as a high-purity solid for conjugation chemistry and linker optimization.

Protease-cleavable Val-Cit dipeptide for intracellular release.
Para-aminobenzyl self-immolative spacer enabling clean payload liberation.
High reported purity suitable for conjugation workflows.
Well-characterized chemical formula and molecular weight for analytical planning.
Available in multiple package sizes to support discovery and scale-up.

Pricing & Availability

5,072

STA PHARMACEUTICAL US LLC Fmoc-L-Val-L-Pro-OH | 1 g | CAS 109425-49-2 | MDL MFCD00237675

Fmoc-L-Val-L-Pro-OH is a Amino Acid reagent (Subcategory: Val) sold by WuXi TIDES. Offered in 1 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 109425-49-2
- MDL: MFCD00237675
- InChIKey: PNFSGKNIZOXLKU-VXKWHMMOSA-N
- Molecular Weight: 436.508
- Molecular Formula: C25H28N2O5
- Purity: ≥95%
- Container Type: 15 mL HDPE
- Pack Size: 1 g
- Net Weight: 1 g
- Gross Weight: 7.8 g
- Commodity Code: 29339980
- Country Of Origin: China
- IUPAC: (((9H-fluoren-9-yl)methoxy)carbonyl)-L-valyl-L-proline
- SMILES: CC([C@H](NC(OCC1C2=C(C3=C1C=CC=C3)C=CC=C2)=O)C(N4CCC[C@H]4C(O)=O)=O)C

Pricing & Availability

5,073

STA PHARMACEUTICAL US LLC Fmoc-(Fmoc-Hmb)-Val-OH | 100 g | CAS 148515-86-0 | MDL MFCD00278816

Fmoc-(Fmoc-Hmb)-Val-OH is a Amino Acid reagent (Subcategory: Val) sold by WuXi TIDES. Offered in 100 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 148515-86-0
- MDL: MFCD00278816
- InChIKey: SEBWBBFTTQDBSZ-FAIXQHPJSA-N
- Molecular Weight: 697.784
- Molecular Formula: C43H39NO8
- Purity: ≥95%
- Container Type: 500 mL HDPE
- Pack Size: 100 g
- Net Weight: 100 g
- Gross Weight: 160.5 g
- Commodity Code: 29242970
- Country Of Origin: China
- IUPAC: N-(((9H-fluoren-9-yl)methoxy)carbonyl)-N-(2-((((9H-fluoren-9-yl)methoxy)carbonyl)oxy)-4-methoxybenzyl)-L-valine
- SMILES: CC([C@H](N(C(OCC1C2=CC=CC=C2C3=CC=CC=C31)=O)CC4=C(OC(OCC5C6=CC=CC=C6C7=CC=CC=C75)=O)C=C(OC)C=C4)C(O)=O)C

Pricing & Availability

5,074

Medchemexpress LLC Val-cit-amide-ph-maytansine | 98.0% | 1055.61 | C51H71ClN8O14 | 10 MG

Val-Cit-amide-Ph-Maytansine is a maytansine-derived small molecule intended for use as an antibody-drug conjugate (ADC) payload or linker component. It is supplied as a powder for formulation and conjugation studies and includes solubility and storage guidance for research handling.

Val-cit-amide-ph-maytansine is a maytansine-derived ADC linker-payload.
Purity is approximately 98.01%.
Molecular weight 1055.61 and formula C51H71ClN8O14.
Supplied as a powder with recommended storage at -20°C (long term) and 4°C (short term).
Highly soluble in DMSO (100 mg/mL) and compatible with recommended in vivo formulations.
Available in small research sizes (1 mg, 5 mg, 10 mg, 25 mg, 50 mg, larger sizes by quote).

Pricing & Availability

5,075

Medchemexpress LLC Fmoc-Val-Cit-PAB-PNP | 863971-53-3 | MFCD22200278 | 99.6% | 766.80 | C40H42N6O10 | 1 G

Fmoc-Val-Cit-PAB-PNP is a protease-cleavable antibody-drug conjugate (ADC) linker containing a valine-citrulline dipeptide and a p-aminobenzyl (PAB) self-immolative spacer; enzymatic cleavage releases carbamate-linked payloads for intracellular delivery.

Contains Val-Cit dipeptide and p-aminobenzyl (PAB) spacer.
Cleavable by lysosomal proteases such as cathepsin B.
Enables enzymatic release of carbamate-linked payloads.
Demonstrates high plasma stability compared with non-cleavable linkers.
Supplied with high purity (99.6%).
Available in milligram to gram scales for development and synthesis workflows.

Pricing & Availability

5,076

Medchemexpress LLC DMBA-SIL-Mal-MMAE | 2923885-49-6 | 1403.65 | 25 MG

DMBA-SIL-Mal-MMAE is a cytotoxin-linker conjugate for ADC with potent antitumor activity. It uses the anti-mitotic agent monomethyl auristatin E (MMAE, a tubulin inhibitor), linked to DMBA-SIL-Mal. It is for research use only and not for sale to patients.

Cytotoxin-linker conjugate for ADC
Potent antitumor activity
Uses anti-mitotic agent monomethyl auristatin E (MMAE, a tubulin inhibitor)
Linked DMBA-SIL-Mal

Pricing & Availability

5,077

Medchemexpress LLC Mc-d-val-d-cit-pab-pnp | 1350456-68-6 | MFCD22200431 | 98.8% | 737.76 | C35H43N7O11 | 5 MG

A protease-cleavable peptide linker used for synthesizing antibody-drug conjugates (ADCs). The linker contains a Val-Cit dipeptide and a para-nitrophenyl (PNP) leaving group, providing enzymatic payload release after internalization. Intended for research use only.

Cleavable Val-Cit dipeptide linker.
Maleimide-compatible conjugation handle for payload attachment.
PNP leaving group for facile conjugation chemistry.
High purity with analytical data (COA, HNMR, LCMS, RP-HPLC).
Available in multiple small pack sizes for research workflows.

Pricing & Availability

5,078

Medchemexpress LLC Fmoc-Val-Ala-OH 25g

Fmoc-Val-Ala-OH is a reagent consisting of a Val-Ala dipeptide with an Fmoc protecting group on its N-terminus Carboxylic acids can be reactive with alcohols or amines while the Fmoc protecting group can be removed with piperidine to allow for coupling with carboxylic acids to form amides

Pricing & Availability

5,079

Medchemexpress LLC Fmoc-NMe-Val-Val-Dil-Dap-OH | 1352202-13-1 | 96.2% | 807.03 | C45H66N4O9 | 500 MG

Fmoc-NMe-Val-Val-Dil-Dap-OH is an Fmoc-protected peptide intermediate used to build drug-linker conjugates for antibody-drug conjugate (ADC) research. Supplied as a solid powder for research use, the compound is characterized by molecular formula C45H66N4O9, molecular weight 807.03, and a reported supplier purity of ~96.2%.

Fmoc-protected peptide intermediate suitable for linker synthesis.
Intended for preparation of drug-linker conjugates used in ADC construction.
Supplied as a solid powder for laboratory handling and storage.
Molecular weight 807.03 and formula C45H66N4O9 to support formulation planning.
Reported high purity suitable for research applications.

Pricing & Availability

5,080

Medchemexpress LLC SuO-Val-Cit-PAB-MMAE | 99.2% | 1264.51 g/mol | C63H97N11O16 | 100 MG

SuO-Val-Cit-PAB-MMAE is a drug-linker conjugate for antibody-drug conjugate research that links the antimitotic payload monomethyl auristatin E (MMAE) to a protease-cleavable SuO-Val-Cit-PAB peptide linker, enabling intracellular release of the cytotoxic payload. The compound is supplied as a solid reagent for use as a building block in ADC synthesis and preclinical studies.

Protease-cleavable SuO-Val-Cit-PAB linker for targeted payload release.
Contains monomethyl auristatin E (MMAE) as the cytotoxic payload.
High purity suitable for research applications.
DMSO soluble; dissolve with ultrasonic and warming as needed.
Stored under inert atmosphere at -80°C to preserve stability.
Supplied in multiple package sizes for research flexibility.

Pricing & Availability

5,081

Medchemexpress LLC Val-cit-PAB-OH | 159857-79-1 | MFCD22381209 | 99.6% | 379.45 g/mol | C18H29N5O4 | 100 MG

Val-cit-PAB-OH is a protease-cleavable, degradable antibody-drug conjugate (ADC) linker (valine-citrulline-p-aminobenzyl alcohol) supplied as a white to off-white solid for research use. It is designed for incorporation into ADCs to enable payload release following enzymatic cleavage and is provided with supporting documentation including a datasheet, certificate of analysis, and safety data sheet.

Degradable protease-cleavable linker enabling controlled payload release.
Suitable for ADC synthesis and linker-drug conjugation workflows.
High purity appropriate for research applications.
Soluble in DMSO at ≥ 100 mg/mL for preparation of concentrated stocks.
Stable when stored at 4°C under inert atmosphere; in solution, store at -80°C for long-term storage.
Supplied as a white to off-white solid for handling and formulation flexibility.

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5,082

Biotium Amine Reactive Dyes Reactive CF Dyes Other Dyes Biotinylation Reagents Reactive CF Dyes CF505 1/EA

CF Dye Succinimidyl Esters (SE NHS esters) are Biotiums next-generation fluorescent dyes in amine-reactive form for labeling antibodies and other proteins CF505 is a green-fluorescent STORM-compatible dye that is structrually equivalent to ATTO 488 Ex/Em 505/519 nm 1 umol per vial

Pricing & Availability

5,083

eMolecules 15891-50-6 | Ac-Nva-OH | Combi-Blocks | MFCD00151963 | 159.185 | C7H13NO3 | 98.000 | CCC[C@H](NC(C)=O)C(O)=O | 5g | 117563712

Ac-Nva-OH | Combi-Blocks | 15891-50-6 | MFCD00151963 | 159.185 | C7H13NO3 | 98.000 | CCC[C@H](NC(C)=O)C(O)=O | 5g | 117563712

Pricing & Availability

5,084

STA PHARMACEUTICAL US LLC Fmoc-L-Val-L-Pro-OH | 50 g | CAS 109425-49-2 | MDL MFCD00237675

Fmoc-L-Val-L-Pro-OH is a Amino Acid reagent (Subcategory: Val) sold by WuXi TIDES. Offered in 50 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 109425-49-2
- MDL: MFCD00237675
- InChIKey: PNFSGKNIZOXLKU-VXKWHMMOSA-N
- Molecular Weight: 436.508
- Molecular Formula: C25H28N2O5
- Purity: ≥95%
- Container Type: 250 mL HDPE
- Pack Size: 50 g
- Net Weight: 50 g
- Gross Weight: 89.8 g
- Commodity Code: 29339980
- Country Of Origin: China
- IUPAC: (((9H-fluoren-9-yl)methoxy)carbonyl)-L-valyl-L-proline
- SMILES: CC([C@H](NC(OCC1C2=C(C3=C1C=CC=C3)C=CC=C2)=O)C(N4CCC[C@H]4C(O)=O)=O)C

Pricing & Availability

5,085

STA PHARMACEUTICAL US LLC Fmoc-D-beta-HomoVal-OH | 10 g | CAS 266318-79-0 | MDL MFCD03095625

Fmoc-D-beta-HomoVal-OH is a Amino Acid reagent (Subcategory: Beta AA) sold by WuXi TIDES. Offered in 10 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 266318-79-0
- MDL: MFCD03095625
- InChIKey: KFDMTAMWOIQTOB-IBGZPJMESA-N
- Molecular Weight: 353.418
- Molecular Formula: C21H23NO4
- Purity: ≥95%
- Container Type: 60 mL HDPE
- Pack Size: 10 g
- Net Weight: 10 g
- Gross Weight: 25 g
- Commodity Code: 29242970
- Country Of Origin: China
- IUPAC: (S)-3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-4-methylpentanoic acid
- SMILES: CC(C)[C@H](CC(O)=O)NC(OCC1C2=CC=CC=C2C3=CC=CC=C31)=O

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Medchemexpress LLC Val-cit-PAB-OH | 159857-79-1 | MFCD 22381209 | 99.6% | 379.45 g/mol | C18H29N5O4 | 5 G Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC Val-cit-amide-ph-maytansine | 98.0% | 1055.61 | C51H71ClN8O14 | 10 MG Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC Fmoc-Val-Cit-PAB-PNP | 863971-53-3 | MFCD22200278 | 99.6% | 766.80 | C40H42N6O10 | 1 G Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC DMBA-SIL-Mal-MMAE | 2923885-49-6 | 1403.65 | 25 MG Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC Mc-d-val-d-cit-pab-pnp | 1350456-68-6 | MFCD22200431 | 98.8% | 737.76 | C35H43N7O11 | 5 MG Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC Fmoc-Val-Ala-OH 25g Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC Fmoc-NMe-Val-Val-Dil-Dap-OH | 1352202-13-1 | 96.2% | 807.03 | C45H66N4O9 | 500 MG Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC SuO-Val-Cit-PAB-MMAE | 99.2% | 1264.51 g/mol | C63H97N11O16 | 100 MG Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC Val-cit-PAB-OH | 159857-79-1 | MFCD22381209 | 99.6% | 379.45 g/mol | C18H29N5O4 | 100 MG Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More