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Recombinant Mouse Prolactin (PRL)

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Product Source Size Cat. No. Price
Recombinant Mouse Prolactin (PRL) Insect cells10 µg Z200495 $600.00
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Data Sheet
Print Version
Alternative Names PRL
Description Prolactin is a neuroendocrine pituitary hormone of 23 kDa. It is produced in increasing amounts during pregnancy and during suckling and acts primarily on the mammary gland by initiating and maintaining lactation in the postpartal phase. Prolactin has been shown also to have cytokine-like activities and to have important immunoregulatory activities. It contributes to the development of lymphoid tissues and the maintenance of physiological immune function and also modulates a variety of T cell immune responses. In addition to triggering resting lymphocytes to cell division, the hormone can also control the magnitude of their response to polyclonal stimuli. Prolactin promotes the proliferation of Nb2 pre-T cell lymphoma cells. In these cells prolactin induces the biphasic expression of a transcription factor, IRF1 and may be involved in cell cycle activation and S phase progression. Prolactin has been reported to activate cellular proliferation in non-reproductive tissue, such as liver, spleen, and thymus. It induces significant proliferation in aortic smooth muscle cells and also enhances proliferation of these cells induced by PDGF.
Gene Symbol PRL
Gene ID 19109
Accession No. P06879
Source Insect cells
Appearance Lyophilized Powder
Molecular Weight 23.0 kDa
Endotoxin Level <1.0 EU/μg of recombinant protein as determined by the LAL method.
Purity >95% as determined by SDS-PAGE
Bioactivity The activity was determined by the dose-dependent proliferation of Nb2 cells.
Formulation Recombinant mouse Prolactin is presented as concentrated 1mg/ml, 0.2 μm filtered 20 mM Tris solution, 0.5 M NaCl pH 7.4, containing 5% trehalose 10% glycerol.
Reconstitution A quick spin of the vial followed by reconstitution in distilled water to a concentration of 0.1 mg/mL.
Storage Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.
Usage For research use only. Not for diagnostic or therapeutic use.
Product Documents
Product References
FAQs
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How are endotoxin levels measured?
1. For estimating the endotoxin levels; we use the LAL (Limulus Amebocyte Lysate) method: The lysate from horseshoe crab amebocytes clots in the presence of very low endotoxin. This reaction is the basis of the Limulus amebocyte lysate (LAL) assay which was approved by the FDA in 1970.

· Endotoxin is generally measured in Endotoxin Units per milliliter (EU/mL).

· For recombinant proteins: EU is reported per microgram of protein.

· One EU = 0.1-0.2 ng endotoxin/µg of protein.

· At abm, we do the LAL chromogenic assays that can detect down to 0.01 EU/ml.
With regard to the BSA levels in some Growth Factors and Cytokines, can you please provide an explanation as to why they are so high?
The amount of BSA, as part of the formulation of a protein, can vary considerably depending on how much BSA was deemed optimum/necessary for protein stability in combination with /in-lieu of - other possible additives. The aforementioned formulations are somewhat analogous to the “carrier” versions of many formulations from “R and D systems” that have as high as 50 µg of BSA per µg of the recombinant protein product. If, needed or desired, abm scientists can substitute BSA for other stabilizing additives for most formulations.
Are your Escherichia coli sourced growth factors: 1) Human derived materials free? 2) Recombinant proteins free?
Yes, all of abm's growth factors made in Escherichia coli using recombinant technology contain no human derived-products or other recombinant proteins. In the rare cases of BSA presence, this will be mentioned in the product's formulation.