Tialpia Leptin B

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Cat-Nr.500-075
Size500 µg
Price580 €
SourceE. coli
Formulationlyophilized
Purity Confirmation> 95.0% as determined by Gel filtration and SDS-PAGE gel.
Length [aa]133
Molecular Weight14.6 kDa
N Terminal SequenceALLTKG
Endotoxin Levels< 0.1 ng/µg of protein (<1EU/µg)
Biological ActivityMonomeric and dimeric Tilapia leptins were biologically active in promoting proliferation of BAF/3 cells stably transfected with the long form of human leptin receptor (hLepR), but their activity was four orders of magnitude lower than that of mammalian leptin. Furthermore, the Tilapia leptins were biologically active in promoting STAT‐LUC activation in COS7 cells transfected with Tilapia leptin receptor but not in cells transfected with human leptin receptor. Tilapia Leptin A was more active than Tilapia Leptin B.
Species ReactivityTilapia
ReconstitutionIt is recommended to reconstitute the lyophilized recombinant Tilapia leptin B in sterile water or sterile 0.4% NaHCO3 adjusted to pH 8-9, not less than 100µg/ml, which can then be further diluted with other aqueous solutions.
SynonymsLep; ob; obese
DescriptionFull‐length cDNA encoding two leptin sequences (tLepA and tLepB) were identified in tilapia (Oreochromis niloticus). The cDNAs of tLepA and tLepB were 486 bp and 459 bp in length, encoding proteins of 161 aa and 152 aa, respectively. The tLepB ‐expressing plasmid was transformed into E. coli and expressed as recombinant proteins upon induction with nalidixic acid, found almost entirely in insoluble inclusion bodies (IBs). The protein was solubilized, refolded and purified to homogeneity by anion‐exchange chromatography. More information can be found in Shpilman et al. (2014) General and Comparative Endocrinology 270, 74-85.
Protein SequenceALLTKGESIKNTIHNIVNIAQITLVHIKKLKLPATPTEVPTPSIDGLSSISHDLGVLDNELQHPFLIQIQADVSSLEGRVRSFALSMECPLKPKPAVQTDESVFPDSRLYMTVAKVQHYLEKLILNKGKLKLC
Uniprot IDA0A067Z7V9
Protein RefSeqNP_001287978.1
mRNA RefSeqNM_001301049.1

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