| Field | Specification |
|---|---|
| Target | |
| Alternative names | Period circadian protein homolog 2;hPER2;Circadian clock protein PERIOD 2;PER2;KIAA0347; |
| UniProt # | |
| Host | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | E.coli-derived human PER2 recombinant protein (Position: N13-K330). Human PER2 shares 84% and 83% amino acid (aa) sequence identity with mouse and rat PER2, respectively. |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Lyophilized |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
This rabbit polyclonal antibody targets period circadian protein homolog 2 (gene PER2) in human samples and is validated for Western blot. The predicted molecular weight is 136.6 kDa, and the supplier reports an observed band at about 130 kDa.
PER2 (Period 2) is a core repressor of the circadian clock that forms complexes with cryptochromes and casein kinase 1 to inhibit CLOCK-BMAL1 transcription. Its timed phosphorylation and degradation help set the length of the daily cycle, and a PER2 mutation causes familial advanced sleep phase syndrome, so it is a central protein in circadian research.
| Target | Period circadian protein homolog 2 (gene PER2; UniProt O15055, human) |
|---|---|
| Host / Clonality / Isotype | Rabbit / Polyclonal / Rabbit IgG |
| Reactivity | Human |
| Form | Lyophilized |
| Formulation | Per vial: 0.9 mg NaCl; 0.2 mg Na2HPO4; 0.05 mg NaN3; plus stabilizers |
| Calculated MW | 136.6 kDa |
| Observed MW | 130 kDa |
| Storage | As supplied: −20 °C for up to 12 months from receipt. After reconstitution: 4 °C for up to 1 month, or aliquot and keep at −20 °C for up to 6 months. Avoid repeated freeze–thaw cycles. |
Validated Applications
| Western blot | 0.1–0.5 µg/mL (Human) |
|---|
Samples with a confirmed band (WB): human K562 cells, human HeLa cells.
Recommended loading (WB): 20–40 µg of total protein per lane.
Conditions in the example images (WB): 5–20% gradient SDS-PAGE under reducing conditions, 30 µg lysate per lane, transfer to nitrocellulose membrane, blocking in 5% non-fat milk, primary antibody at 0.5 µg/mL overnight at 4 °C, HRP-conjugated secondary antibody at 1:5000, ECL detection.
Immunogen
Recombinant human PER2 fragment (Asn13–Lys330), expressed in E. coli. Sequence identity with the mouse and rat orthologs: 84% and 83%, respectively.
Reactivity Notes
The supplier lists reactivity with human. Tissue expression noted by UniProt (human): Widely expressed. The samples tested by the supplier (listed above) are a practical starting point for positive controls.
Safety
Customization & Add-ons: Can’t find the antibody you need—or require a custom format for your assay? We can help you source the best match or support custom antibody solutions for diverse research needs, including species and isotype selection, conjugations and labeling (e.g., HRP/AP, biotin, fluorophores), purification grade options (Protein A/G, affinity purified), formulation preferences (buffer selection, carrier-free, glycerol-free), custom concentrations and aliquoting, low-endotoxin options for cell-based work, and application-focused QC/validation support (project dependent). Click Talk to a Scientist to submit a request, email us at support@biohippo.com, or explore our Research Services for additional support—our team will follow up with feasibility details and next steps.
Weitian Li et al. (2022) Role of Sleep Restriction in Daily Rhythms of Expression of Hypothalamic Core Clock Genes in Mice. Current Issues in Molecular Biology. 10.3390/cimb44020042
