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Active Beta-1,4-Galactosyltransferase 1 (b4GALT1)

GTB; B4-GALT1; GGTB2; GT1; Beta4Gal-T1; Lactose Synthase A Protein; N-Acetyllactosamine Synthase; Nal synthase; beta-N-acetylglucosamine beta-1,4-galactosyltransferase 1

ACTIVITY TEST

Beta-1,4-galactosyltransferase 1 (B4GALT1) is a key glycosyltransferase. It mainly mediates the addition of galactose to glycoproteins and glycolipids in the Golgi apparatus, playing essential roles in cell adhesion, signaling, and normal physiological functions.The galactosyltransferase B4GALT1 can transfer the galactosyl group from UDP-galactose to N-acetyl-α-D-glucosamine. The resulting UDP can generate free phosphate under the action of a coupled phosphatase. Dilute UDP-galactose, coupling phosphatase 1, and GlcNAc in assay buffer, then mix equal volumes to prepare the reaction mixture. Dilute rhB4GalT1 in assay buffer. Prepare a 100 µM phosphate standard stock and perform six half serial dilutions for a 0.078–5.0 nmol/well curve. Add 50 µL standards and blank to the plate. Add 20 µL enzyme or buffer control, then start the reaction with 30 µL reaction mixture. Incubate 15 min at room temperature. Add malachite green reagents A and B with water sequentially, mix, incubate 20 min, and read absorbance at 620 nm.The specific activity of recombinant human B4GALT1 is > 27000 pmol/min/µg.Specific Activity (pmol/min/μg) = [Phosphate released (nmol) × 1000 (pmol/nmol)] / [Incubation time (min) × Amount of enzyme (μg)]<br/> *Derived from the phosphate standard curve using linear or 4-parameter fitting and adjusted for Control.

USAGE

Reconstitute in 10mM PBS (pH7.4) to a concentration of 0.1-1.0 mg/mL. Do not vortex.

STORAGE

Avoid repeated freeze/thaw cycles. Store at 2-8°C for one month. Aliquot and store at -80°C for 12 months.

STABILITY

The thermal stability is described by the loss rate. The loss rate was determined by accelerated thermal degradation test, that is, incubate the protein at 37°C for 48h, and no obvious degradation and precipitation were observed. The loss rate is less than 5% within the expiration date under appropriate storage condition.

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