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.

Search Within Results

3,091 – 3,105 of 36,155 results

3,091

eMolecules 52-90-4 | L-Cysteine | Chem-Impex | MFCD00004881 | 121.150 | C3H7NO2S | 99.000 | NC(CS)C(O)=O | 250g | 322127111

L-Cysteine | Chem-Impex | 52-90-4 | MFCD00004881 | 121.150 | C3H7NO2S | 99.000 | NC(CS)C(O)=O | 250g | 322127111

Pricing & Availability

3,092

eMolecules 52-90-4 | L-Cysteine | Chem-Impex | MFCD00004881 | 121.150 | C3H7NO2S | 99.000 | NC(CS)C(O)=O | 25g | 272384894

L-Cysteine | Chem-Impex | 52-90-4 | MFCD00004881 | 121.150 | C3H7NO2S | 99.000 | NC(CS)C(O)=O | 25g | 272384894

Pricing & Availability

3,093

eMolecules 52-90-4 | L-Cysteine | Chem-Impex | MFCD00004881 | 121.150 | C3H7NO2S | 99.000 | NC(CS)C(O)=O | 100g | 272384895

L-Cysteine | Chem-Impex | 52-90-4 | MFCD00004881 | 121.150 | C3H7NO2S | 99.000 | NC(CS)C(O)=O | 100g | 272384895

Pricing & Availability

3,094

Medchemexpress LLC Cys-McMMAF | 1160590-05-5 | 99.5% | 1046.32 g/mol | C52H83N7O13S | 1 MG

Cys-McMMAF is the cysteine-linked MMAF payload released from an antibody-drug conjugate. It is an MMAF derivative joined via a maleimidocaproyl linker, supplied as a high-purity research reagent for use in preclinical antibody-drug conjugate studies.

High purity 99.5%.
Molecular weight 1046.32 g/mol and formula C52H83N7O13S.
Cas number 1160590-05-5.
Supplied in small milligram quantities suitable for preclinical research.
Intended for use as a cysteine-linked payload in ADC payload characterization and in vitro or in vivo studies.

Pricing & Availability

3,095

eMolecules 7652-46-2 | Ac-Cys-OMe | Ambeed | MFCD00237476 | 177.220 | C6H11NO3S | 97.000 | COC(=O)[C@H](CS)NC(C)=O | 5g | 525058571

Ac-Cys-OMe | Ambeed | 7652-46-2 | MFCD00237476 | 177.220 | C6H11NO3S | 97.000 | COC(=O)[C@H](CS)NC(C)=O | 5g | 525058571

Pricing & Availability

3,096

Medchemexpress LLC H-Cys(Bzl)-OH | 3054-01-1 | MFCD00002613 | 99.6% | 211.28 g/mol | C10H13NO2S | 10 G

H-Cys(Bzl)-OH is a benzyl-protected cysteine derivative used as a building block in peptide synthesis and other organic chemistry applications. Supplied as a solid with high purity, this reagent is intended for research use and is provided with analytical documentation to support compound identity and quality.

Benzyl protection on the thiol for selective coupling.
High purity suitable for synthesis and analysis.
Supplied as a solid, white to off-white, for easy handling.
Available in lab-scale package sizes, including 10 g.
Analytical data available (COA, HNMR, LCMS).
Recommended sealed storage to minimize moisture exposure.

Pricing & Availability

3,097

eMolecules 616-91-1 | Acetyl-L-cysteine | Chem-Impex | MFCD00151956 | 163.190 | C5H9NO3S | 99.000 | CC(=O)NC(CS)C(O)=O | 25g | 112440667

Acetyl-L-cysteine | Chem-Impex | 616-91-1 | MFCD00151956 | 163.190 | C5H9NO3S | 99.000 | CC(=O)NC(CS)C(O)=O | 25g | 112440667

Pricing & Availability

3,098

eMolecules 616-91-1 | N-Acetyl-L-Cysteine | AA Blocks LLC | MFCD00004880 | 163.190 | C5H9NO3S | 0.000 | CC(=O)N[C@@H](CS)C(O)=O | 5g | 626241209

N-Acetyl-L-Cysteine | AA Blocks LLC | 616-91-1 | MFCD00004880 | 163.190 | C5H9NO3S | 0.000 | CC(=O)N[C@@H](CS)C(O)=O | 5g | 626241209

Pricing & Availability

3,099

STA PHARMACEUTICAL US LLC Fmoc-D-N-Me-hCys(Trt)-OH | 5 g | CAS 526210-78-6 | InChIKey XVDJDZSADBCCPL-PSXMRANNSA-N

Fmoc-D-N-Me-hCys(Trt)-OH is a Amino Acid reagent (Subcategory: Homo-natural AA) sold by WuXi TIDES. Offered in 5 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 526210-78-6
- MDL: No data
- InChIKey: XVDJDZSADBCCPL-PSXMRANNSA-N
- Molecular Weight: 613.772
- Molecular Formula: C39H35NO4S
- Purity: ≥95%
- Container Type: 30 mL HDPE
- Pack Size: 5 g
- Net Weight: 5 g
- Gross Weight: 16.5 g
- Commodity Code: 29309095
- Country Of Origin: China
- IUPAC: N-(((9H-fluoren-9-yl)methoxy)carbonyl)-N-methyl-S-trityl-D-homocysteine
- SMILES: CN([C@@H](C(O)=O)CCSC(C1=CC=CC=C1)(C2=CC=CC=C2)C3=CC=CC=C3)C(OCC4C5=CC=CC=C5C6=CC=CC=C64)=O

Pricing & Availability

3,100

STA PHARMACEUTICAL US LLC Fmoc-D-Selenocysteine(Trityl)-OH | 5 g | CAS 1639843-37-0 | MDL MFCD11041250

Fmoc-D-Selenocysteine(Trityl)-OH is a Amino Acid reagent (Subcategory: Cys) sold by WuXi TIDES. Offered in 5 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 1639843-37-0
- MDL: MFCD11041250
- InChIKey: BNOGRCVLEKLKJK-UMSFTDKQSA-N
- Molecular Weight: 632.629
- Molecular Formula: C37H31NO4Se
- Purity: ≥95%
- Container Type: 30 mL HDPE
- Pack Size: 5 g
- Net Weight: 5 g
- Gross Weight: 16.5 g
- Commodity Code: 29319000
- Country Of Origin: China
- IUPAC: (R)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(tritylselanyl)propanoic acid
- SMILES: OC(=O)[C@H](C[Se]C(C1=CC=CC=C1)(C1=CC=CC=C1)C1=CC=CC=C1)NC(=O)OCC1C2=CC=CC=C2C2=CC=CC=C12

Pricing & Availability

3,101

STA PHARMACEUTICAL US LLC Fmoc-L-Cys(2-Hydroxyethyl)-OH | 100 g | CAS 200354-35-4 | MDL MFCD00672330

Fmoc-L-Cys(2-Hydroxyethyl)-OH is a Amino Acid reagent (Subcategory: Cys) sold by WuXi TIDES. Offered in 100 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 200354-35-4
- MDL: MFCD00672330
- InChIKey: VDIVFUTVJUGBOW-SFHVURJKSA-N
- Molecular Weight: 387.45
- Molecular Formula: C20H21NO5S
- Purity: ≥95%
- Container Type: 500 mL HDPE
- Pack Size: 100 g
- Net Weight: 100 g
- Gross Weight: 160.5 g
- Commodity Code: 29309016
- Country Of Origin: China
- IUPAC: N-(((9H-fluoren-9-yl)methoxy)carbonyl)-S-(2-hydroxyethyl)-L-cysteine
- SMILES: OCCSC[C@H](NC(OCC1C2=CC=CC=C2C3=CC=CC=C31)=O)C(O)=O

Pricing & Availability

3,102

Apexbio Technology LLC Fmoc-Cys(Trt)-OH 103213-32-7 100g

Fmoc-Cys(Trt)-OH (CAS 103213-32-7) is a cysteine derivative commonly used in Fmoc-based solid-phase peptide synthesis The compound features a cysteine residue with its thiol group protected by a trityl (Trt) group and the amino group transiently masked by a fluorenylmethyloxycarbonyl (Fmoc) group During peptide assembly standard deprotection and coupling protocols enable stepwise peptide elongation After synthesis mild acidic conditions selectively remove the Trt group to yield free thiols facilitating disulfide bond formation Based on these properties Fmoc-Cys(Trt)-OH is extensively applied to the synthesis of cyclic peptides disulfide-constrained peptide analogs and therapeutically relevant proteins with defined disulfide linkages

Pricing & Availability

3,103

Medchemexpress LLC Boc-Cys(Npys)-OH | 76880-29-0 | MFCD00153301 | 98.0% | 375.42 g/mol | C13H17N3O6S2 | 1 G

Boc-Cys(Npys)-OH is a Boc-protected cysteine derivative in which the cysteine thiol is protected with an Npys (3-nitro-2-pyridylsulfanyl) group. It is supplied as a light yellow solid for use in peptide synthesis and thiol-directed chemistry, facilitating selective thiol manipulation and site-directed disulfide bond formation.

Boc-protected amine suitable for standard peptide coupling
Npys thiol protecting group enables directed disulfide formation
Suitable for solid-phase and solution-phase peptide synthesis
High purity for consistent synthetic results
Light yellow solid, easy to handle and store

Pricing & Availability

3,104

STA PHARMACEUTICAL US LLC Fmoc-L-Cys(4-MeBzl)-OH | 10 g | CAS 136050-67-4 | MDL MFCD00065634

Fmoc-L-Cys(4-MeBzl)-OH is a Amino Acid reagent (Subcategory: Cys) sold by WuXi TIDES. Offered in 10 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 136050-67-4
- MDL: MFCD00065634
- InChIKey: OQYBTXFHTQYWCZ-DEOSSOPVSA-N
- Molecular Weight: 447.549
- Molecular Formula: C26H25NO4S
- Purity: ≥95%
- Container Type: 60 mL HDPE
- Pack Size: 10 g
- Net Weight: 10 g
- Gross Weight: 25 g
- Commodity Code: 29309016
- Country Of Origin: China
- IUPAC: N-(((9H-fluoren-9-yl)methoxy)carbonyl)-S-(4-methylbenzyl)-L-cysteine
- SMILES: CC1=CC=C(C=C1)CSC[C@@H](C(O)=O)NC(OCC2C3=CC=CC=C3C4=CC=CC=C42)=O

Pricing & Availability

3,105

STA PHARMACEUTICAL US LLC Fmoc-N-Me-D-Cys(Acm)-OH | 25 g | CAS 481642-19-7 | MDL MFCD30187631

Fmoc-N-Me-D-Cys(Acm)-OH is a Amino Acid reagent (Subcategory: N-Me AA) sold by WuXi TIDES. Offered in 25 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 481642-19-7
- MDL: MFCD30187631
- InChIKey: CMFFRUPIEQKOGH-FQEVSTJZSA-N
- Molecular Weight: 428.503
- Molecular Formula: C22H24N2O5S
- Purity: ≥95%
- Container Type: 125 mL HDPE
- Pack Size: 25 g
- Net Weight: 25 g
- Gross Weight: 54.3 g
- Commodity Code: 29309016
- Country Of Origin: China
- IUPAC: N-(((9H-fluoren-9-yl)methoxy)carbonyl)-S-(acetamidomethyl)-N-methyl-L-cysteine
- SMILES: CN(C(OCC1C2=C(C3=C1C=CC=C3)C=CC=C2)=O)[C@H](C(O)=O)CSCNC(C)=O

Pricing & Availability

Amino Acids

Filtered Search Results

Narrow Results

Medchemexpress LLC Cys-McMMAF | 1160590-05-5 | 99.5% | 1046.32 g/mol | C52H83N7O13S | 1 MG Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC H-Cys(Bzl)-OH | 3054-01-1 | MFCD00002613 | 99.6% | 211.28 g/mol | C10H13NO2S | 10 G Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Apexbio Technology LLC Fmoc-Cys(Trt)-OH 103213-32-7 100g Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC Boc-Cys(Npys)-OH | 76880-29-0 | MFCD00153301 | 98.0% | 375.42 g/mol | C13H17N3O6S2 | 1 G Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Medchemexpress LLC Cys-McMMAF | 1160590-05-5 | 99.5% | 1046.32 g/mol | C52H83N7O13S | 1 MG

Medchemexpress LLC H-Cys(Bzl)-OH | 3054-01-1 | MFCD00002613 | 99.6% | 211.28 g/mol | C10H13NO2S | 10 G

Apexbio Technology LLC Fmoc-Cys(Trt)-OH 103213-32-7 100g

Medchemexpress LLC Boc-Cys(Npys)-OH | 76880-29-0 | MFCD00153301 | 98.0% | 375.42 g/mol | C13H17N3O6S2 | 1 G