69050 Sigma-Aldrich

Anti-Cre Antibody




Related Categories Alphabetical Index, Antibodies, CR-CR, Primary Antibodies
shipped in   wet ice
Quality Level   100
antibody product type   primary antibodies
mfr. no.   Novagen®
storage condition   OK to freeze
  avoid repeated freeze/thaw cycles
storage conditions   -20C


General description

Recombinase cre (UniProt: P06956; also known as Cre) is encoded by the cre gene (Gene ID: 2777477) in Escherichia phage P1 (Bacteriophage P1). Cre (Causes recombination with Cyclization recombinase), a 38 kDa DNA recombinase of the ′phage′ integrase family, is derived from the P1 bacteriophage. It catalyzes site-specific recombination and is highly specific for a 34-bp DNA sequence motif called loxP (locus of X-over P1) found in P1 DNA. The loxP site is composed of a variable asymmetric 8-bp sequence in between two sets of 13-bp palindromic sequences (ATAACTTCGTATA-NNNTANNN-TATACGAAGTTAT). Two cre recombinase proteins, each bind to one of the two 13-bp palindromic sequences at a loxP site, form a dimer. This dimer then binds to a second dimer on another loxP site to form a tetramer. The two sites joined by the tetramer are parallel in orientation and the double stranded DNA is cut at both loxP sites. The strands are then rejoined with DNA ligase. Because the Cre gene and loxP sites are not native to most species, they are often introduced into target cells or tissues and employed as a means to precisely control the expression of genes both in cultured cells in vitro and in animals in vivo.

Specific, sensitive detection of Cre recombinase in cells and cell lysates

Supplied as purified rabbit polyclonal antibody in buffer containing 0.1 M Tris-Glycine, 0.15 M NaCl, pH 7.4 with 0.05% sodium azide and 50% glycerol.

Evaluated by Western Blotting with Recombinant Cre-His.

Western Blotting Analysis: Representative lot data.Recombinant Cre-His loaded at 20 ng/lane (Lane 1) and 10 ng/lane (Lane 2) was probed with Cat. No. 69050-3, Anti-Cre (1:10,000 dilution). Proteins were visualized using a Donkey Anti-Rabbit secondary antibody conjugated to HRP and a chemiluminescence detection system. Arrow indicates Cre (~39 kDa).

Legal Information

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


50 μL in Plastic ampoule


Toxicity: Standard Handling (A)

Safety & Documentation

Safety Information

WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable
Protocols & Articles


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