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Recombinant Human Lactate Dehydrogenase B, His-tagged

Cat. No. : LDHB-2570H
Product Overview : Recombinant human LDHB protein, fused to His-tagging at N-terminus, was expressed in E.coli and purified by using conventional chromatography techniques. MW = 38.8 kDa (354aa).
Description : LDHB, also known as L-lactate dehydrogenase B chain, is a member of the lactate dehydrogenase family. It is an oxidoreductase which catalyses the interconversion of pyruvate and lactate with concomitant interconversion of NADH and NAD+. As this protein can also catalyze the oxidation of hydroxybutyrate, it is occasionally called Hydroxybutyrate Dehydrogenase (HBD). The LDH family consists of three members, LDH-A, LDH-B and LDH-C. LDHs function as powerful markers for germ cell tumors.
Source : E.coli.
Sequences Of Amino Acids : MGSSHHHHHH SSGLVPRGSH MATLKEKLIA PVAEEEATVP NNKITVVGVG QVGMACAISI LGKSLADELA LVDVLEDKLK GEMMDLQHGS LFLQTPKIVA DKDYSVTANS KIVVVTAGVR QQEGESRLNL VQRNVNVFKF IIPQIVKYSP DCIIIVVSNP VDILTYVTWK LSGLPKHRVI GSGCNLDSAR FRYLMAEKLG IHPSSCHGWI LGEHGDSSVA VWSGVNVAGV SLQELNPEMG TDNDSENWKE VHKMVVESAY EVIKLKGYTN WAIGLSVADL IESMLKNLSR IHPVSTMVKG MYGIENEVFL SLPCILNARG LTSVINQKLK DDEVAQLKKS ADTLWDIQKD LKDL
Form : Liquid. In 20mM Tris-HCl buffer(pH 8.0) containing 10% glycerol 1mM DTT.
Molecular Weight : 38.8 kDa (354aa) confirmed by MALDI-TOF
Purity : > 95% by SDS – PAGE.
Concentration : 1 mg/ml (determined by Bradford assay).
Biological Activity : Specific activity is > 6 units/mg. in which one unit will convert 1.0 umole of pyruvate to L-lactate and beta-NAD per minute at pH 7.5 at 37°C.
Activity Assay : 1. Prepare a 1.5 ml reaction mix into a suitable container, adjust to pH7.5 at 37C, and pre-chill on ice before use: The final concentrations are 100mM Sodium phosphate, 0.12 mM beta-nicotinamide adenine dinucleotide, reduced form, 2.3mM Pyruvate, 0.033% (w/v) bovine serum albumin. 2. Equilibrate to 37C and monitor at A340nm until the value is constant using a spectrophotometer3. Add 50ul of recombinant LDHB protein in various concentrations (0.1ug, 0.5ug) in assay buffer. 4. Mix by inversion and record the increase at A340nm for 5 minutes.
Storage : Can be stored at +4°C short term (1-2 weeks). For long term storage, aliquot and store at -20°C or -70°C. Avoid repeated freezing and thawing cycles.
Gene Name : LDHB lactate dehydrogenase B [ Homo sapiens ]
Synonyms : LDHB; lactate dehydrogenase B; LDH-H; TRG-5; L-lactate dehydrogenase B chain; LDH-B; LDH heart subunit; OTTHUMP00000165231; renal carcinoma antigen NY-REN-46; EC 1.1.1.27
Gene ID : 3945
mRNA Refseq : NM_001174097
Protein Refseq : NP_001167568
MIM : 150100
UniProt ID : P07195
Chromosome Location : 12p12.2-p12.1
Function : L-lactate dehydrogenase activity; NAD or NADH binding; identical protein binding; oxidoreductase activity

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