EdU (5-ethynyl-2'-deoxyuridine) can be used as a replacement for BrdU (5-bromo-2'-deoxyuridine) and directly measures de novo DNA synthesis or S-phase synthesis of the cell cycle using click chemistry. Click chemistry is a method of covalently coupling an azide with an alkyne. Detection of EdU employs the copper(I) catalyzed click reaction with an azide modified fluorescent dye to form a stable triazole ring. Because of the small size of the click detection reagent, no harsh denaturation steps are needed to gain access to the DNA. Eliminating this step allows for more reproducible results, a simpler and quicker protocol and measurements which can easily be multiplexed with relevant antibody based targets including phospho-histone H3, Ki-67, and cyclin B1 as well as dual-pulse experiments with BrdU by flow cytometry, fluorescence microscopy, microplate (HTS) or high-throughput imaging (HCS).



EdU (5-ethynyl-2'-deoxyuridine)
Molecular formula: C11H12BrN2O5
Molecular weight: 252.23
CAS name/number: 61135-33-9



Cell proliferation analysis in vitro and in vivo.

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Buy Cat.No. Product Name Ex/Em Unit Price
A012 EdU   50 mg $80


Protocol (PDF): A012


A chemical method for fast and sensitive detection of DNA synthesis in vivo.
Salic A, Mitchison TJ,
Proc Natl Acad Sci U S A (2008) 105:2415-2420

Chick embryo proliferation studies using EdU labeling.
Warren M, Puskarczyk K, Chapman SC,
Dev Dyn (2009) 238:944-949

Cell type specific applicability of 5-ethynyl-2′-deoxyuridine (EdU) for dynamic proliferation assessment in flow cytometry.
Diermeier-Daucher S, Clarke ST, Hill D, Vollmann-Zwerenz A, Bradford JA, Brockhoff G,
Cytometry A (2009) 75:535-546