All Photos(14)




Anti-TYMS Antibody, clone 1E20 ZooMAb® Rabbit Monoclonal

enhanced validationgreener alternative

recombinant, expressed in HEK 293 cells

Sign Into View Organizational & Contract Pricing

EC:, TS, TSase

biological source


Quality Level


expressed in HEK 293 cells



antibody form

purified antibody

antibody product type

primary antibodies


1E20, recombinant monoclonal


1E20 Clone

product line

ZooMAb® learn more



mol wt

calculated mol wt 35.72 kDa
observed mol wt ~33 kDa

purified by

using Protein A

species reactivity

rat, human

species reactivity (predicted by homology)

porcine, monkey


antibody small pack of 25 μL

greener alternative product characteristics

Waste Prevention
Designing Safer Chemicals
Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

enhanced validation

recombinant expression
Learn more about Antibody Enhanced Validation


affinity binding assay: suitable
flow cytometry: suitable
immunocytochemistry: suitable
immunohistochemistry: suitable
western blot: suitable



epitope sequence


Protein ID accession no.

UniProt accession no.

greener alternative category

shipped in


storage temp.


Gene Information

human ... TYMS(7298)

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item








biological source


biological source


biological source


biological source



1E20, recombinant monoclonal


1E23, recombinant monoclonal


1H20, recombinant monoclonal


2H6, recombinant monoclonal

Gene Information

human ... TYMS(7298)

Gene Information

human ... LYN(4067)

Gene Information

human ... MTAP(4507)

Gene Information

human ... TRIP12(9320)

antibody form

purified antibody

antibody form

purified antibody

antibody form

purified antibody

antibody form

purified antibody

Still not finding the right product?  

Give our Product Selector Tool a try.

General description

We are committed to bringing you greener alternative products, which adhere to one or more of The 12 Principles of Green Chemistry. This antibody is Preservative-free, produced without the harm or sacrifice of animals and exceptionally stable to allow for ambient shipping and storage if needed and thus aligns with "Waste Prevention", "Designing Safer Chemicals" and "Design for Energy Efficiency". Click here for more information.
ZooMAb® antibodies represent an entirely new generation of recombinant monoclonal antibodies. Each ZooMAb® antibody is manufactured using our proprietary recombinant expression system, purified to homogeneity, and precisely dispensed to produce robust and highly reproducible lot-to-lot consistency. Only top-performing clones are released for use by researchers. Each antibody is validated for high specificity and affinity across multiple applications, including its most commonly used application. ZooMAb® antibodies are reliably available and ready to ship when you need them.


Clone 1E20 is a ZooMAb® rabbit recombinant monoclonal antibody that specifically detects Thymidylate synthase (TYMS). It targets an epitope within 24 amino acids from the C-terminal region.


KLH-conjugated linear peptide corresponding to 24 amino acids from the C-terminal region of human Thymidylate synthase (TYMS).


Quality Control Testing

Evaluated by Western Blotting in HEK293 cell lysate.

Western Blotting Analysis: A 1:1,000 dilution of this antibody detected Thymidylate synthase (TYMS) in HEK293 cell lysate.

Tested Applications

Western Blotting Analysis: A 1:10,000 dilution from a representative lot detected TYMS in MCF-7 and L6 cell lysates.

Affinity Binding Assay: A representative lot of this antibody bound Thymidylate Synthase (TYMS) peptide with a KD of 2.2 x 10-6 in an affinity binding assay.

Flow Cytometry Analysis: 0.1 µg from a representative lot detected Thymidylate Synthase (TYMS) in one million HEK293 cells.

Immunocytochemistry Analysis: A 1:100 dilution from a representative lot detected Thymidylate Synthase (TYMS) in HEK 293 cells.

Immunohistochemistry (Paraffin) Analysis: A 1:1,000 dilution from a representative lot detected Thymidylate Synthase (TYMS) in human tonsil tissue sections.

Note: Actual optimal working dilutions must be determined by end user as specimens, and experimental conditions may vary with the end user.

Target description

Thymidylate synthase (UniProt: P04818; also known as EC:, TS, TSase) is encoded by the TYMS (also known as TS, OK/SW-cl.29) gene (Gene ID: 7298) in human.  Thymidylate synthase is a homodimeric enzyme that catalyzes the reductive methylation of 2′-deoxyuridine 5′-monophosphate (dUMP) to thymidine 5′-monophosphate (dTMP), using the co-substrate, 5,10- methylenetetrahydrofolate (CH2H4folate) as a 1-carbon donor and reductant and contributes to the de novo mitochondrial thymidylate biosynthesis pathway. This reaction is the sole de novo biosynthesis of thymine in DNA. Cells that produce DNA need larger amounts of thymidylate synthase to fuel the DNA production. In the cell cycle more thymidylate synthase is produced during S and G2 phase where the most rapid cell proliferation takes place. In some cancers, such as those of the gastrointestinal tract, thymidylate synthase is considered as a tumor marker. Normal gastrointestinal tract cells undergoing rapid proliferation, and tumors cells undergoing rapid growth display higher expression of thymidylate synthase. The antiproliferative effect of thymidylate synthase depletion is accompanied by arrest of cells in S phase of the cell cycle and the induction of caspase-dependent apoptosis. This depletion also down-regulates the level of XIAP and activates the mitochondrial pathway of apoptosis. Three isoforms of Thymidylate synthase have been described that are produced by alternative splicing. This ZooMAb® recombinant monoclonal antibody, generated by our propriety technology, offers significantly enhanced specificity, affinity, reproducibility, and stability over conventional monoclonals. (Ref.: Takezawa, K., et al. (2010). Br. J. Cancer. 103(3); 354-361; Rose, MG., et al. (2002). Clin. Colorectal Cancer. 1(4); 220-229).

Physical form

Purified recombinant rabbit monoclonal antibody IgG, lyophilized in PBS, 5% Trehalose, normal appearance a coarse or translucent resin. The PBS/trehalose components in the ZooMAb formulation can have the appearance of a semi-solid (bead like gel) after lyophilization. This is a normal phenomenon. Please follow the recommended reconstitution procedure in the data sheet to dissolve the semi-solid, bead-like, gel-appearing material. The resulting antibody solution is completely stable and functional as proven by full functional testing. Contains no biocide or preservatives, such as azide, or any animal by-products. Larger pack sizes provided as multiples of 25 µL.


300 µg/mL after reconstitution at 25 µL per vial. Please refer to guidance on suggested starting dilutions and/or titers per application and sample type.

Storage and Stability

Recommend storage of lyophilized product at 2-8°C; Before reconstitution, micro-centrifuge vials briefly to spin down material to bottom of the vial; Reconstitute each vial by adding 25 µL of filtered lab grade water or PBS; Reconstituted antibodies can be stored at 2-8°C, or -20°C for long term storage. Avoid repeated freeze-thaws.

Other Notes

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

Legal Information

ZooMAb is a registered trademark of Merck KGaA, Darmstadt, Germany


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Storage Class

11 - Combustible Solids




Not applicable


Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).


Product Number
Pack Size/Quantity

Additional examples:





enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service