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You are here:Home » Antibodies » Abs to Circadian Proteins » Anti -Clock

Anti -Clock

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Specifications

Clone Host Grade Applications
Polyclonal Rabbit Serum E B
CLOCK, a basic helix-loop-helix (bHLH)/PAS protein, is an important factor in the molecular clock mechanism. Mutations in this protein lead to abnormal circadian behavior and defective transcriptional activity. CLOCK has been shown to interact strongly with other bHLH-PAS proteins such as MOP3, a BMAL1 isoform.
Catalog #C5843-15
Several endogenous factors have been linked to rhythmicity or circadian behavior of living organisms. In Drosophila, the genes period (dPer) and timeless (tim), and in Neurospora frequency (frq), have been proposed to be responsible for their circadian rhythm. Recently human and mouse genes encoding a basic helix-loop-helix (bHLH) and Per-ARNT-Sim (PAS)-domain with significant similarity to the Drosophila Period have been reported. The cDNA sequences of hPER and mPer1 (also named RIGUI) are predicted to encode for proteins of length 1290 and 1291 amino acids respectively. Homologues of mPer1 designated Per 2 (1257 aa) and Per3 (1113 aa) have also been cloned. Both Per1 and Per2 levels show circadian rhythm in the SCN and eyes. It has been suggested that mPer regulates neuronal activity in the SCN. Using genetic approach, a single mutation (A to T in the Clock gene affects circadian rhythmicity in mice. Clock has been mapped to chromosome 5. Mouse Clock encodes a transcription factor, a single polypeptide chain of 855 aa (predicted calculated mol wt ~97kD; pI 6.52; hClock, 846 aa). Clock is abundantly expressed in brain (SCN, pyrifom cortex, hippocampus) as well as in other tissues (eye, total brain, tested, ovaries, liver, heart, lung, and kidney). Although, Clock is constitutively expressed (not rhythmic) in the SCN, it may still be an important component.
ApplicationsSuitable for use in ELISA, Western Blot. Other applications not tested.
Recommended DilutionWestern Blot: 1:1000-1:5000 for neat serum and 1-10ug/ml for affinity pure using ECL.
ELISA 1:10,000-1:100,000 using 50-100ng of control peptide/well.
Immunohistochemistry & Immunofluorescence We recommend the use of affinity purified antibody at 2-20ug/ml (see refs 2 on this antibody).
Optimal dilutions to be determined by the researcher.
Storage and StabilityMay be stored at 4°C for short-term only. For long-term storage and to avoid repeated freezing and thawing, aliquot and add glycerol (40-50%). Freeze at -20°C. Aliquots are stable for at least 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
Clone TypePolyclonal
IsotypeIgG
HostRabbit
SourceHuman
ConcentrationAs reported
FormSupplied as a liquid, neat serum, 40% glycerol.
PuritySerum
ImmunogenA 20-aa peptide sequence within the C-terminus of human Clock (1) was synthesized, coupled to KLH
SpecificityThe peptide sequence is 90% conserved in mouse/rat, 80% in Japanese quail, chicken and 75% in frog clock protein. No significant homology is seen with PER or other known proteins. Antibody crossreactivity with Per1 from other species is not known. Control peptide, because of its low MW (<3kD), is not suitable for Western. It is recommed for ELISA, dot blot, or for antibody blocking experiments (use 5-10 ug of control peptide per 1 ug of aff pure IgG or 1 ul of antiserum) to demonstrate antibody specificity
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.


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