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Galectin-1/LGALS1 Protein, Human

Cat. No.: HY-P73072
COA Handling Instructions

Galectin-1/LGALS1 is a lectin that binds β-galactoside and complex carbohydrates and regulates apoptosis, proliferation, and differentiation. It inhibits CD45 phosphatase activity, blocks Lyn kinase dephosphorylation, and induces T cell apoptosis. Galectin-1/LGALS1 Protein, Human is the recombinant human-derived Galectin-1/LGALS1 protein, expressed by E. coli , with tag free.

For research use only. We do not sell to patients.

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Description

Galectin-1/LGALS1 is a lectin that binds β-galactoside and complex carbohydrates and regulates apoptosis, proliferation, and differentiation. It inhibits CD45 phosphatase activity, blocks Lyn kinase dephosphorylation, and induces T cell apoptosis. Galectin-1/LGALS1 Protein, Human is the recombinant human-derived Galectin-1/LGALS1 protein, expressed by E. coli , with tag free.

Background

The Galectin-1/LGALS1 protein serves as a lectin with the ability to bind beta-galactoside and a diverse range of complex carbohydrates. It plays a pivotal role in the regulation of apoptosis, cell proliferation, and cell differentiation. Galectin-1/LGALS1 exerts its influence by inhibiting the protein phosphatase activity of CD45, consequently impeding the dephosphorylation of Lyn kinase. Additionally, it acts as a potent inducer of T-cell apoptosis. Existing as a homodimer, Galectin-1/LGALS1 forms interactions with a variety of cellular entities, including CD2, CD3, CD4, CD6, CD7, CD43, ALCAM, and CD45. It also binds LGALS3BP, laminin (via poly-N-acetyllactosamine), and SUSD2. Notably, Galectin-1/LGALS1 engages in an interaction with the cargo receptor TMED10, facilitating translocation from the cytoplasm into the endoplasmic reticulum-Golgi intermediate compartment (ERGIC) and subsequent secretion.

Biological Activity

1.Measured by its ability to agglutinate human red blood cells and the ED50 is typically 3-30μg/mL.
2.Measured in a cell proliferation assay using ARPE-19 cells. The ED50 for this effect is 0.2112-0.3052 μg/mL.

  • Measured in a cell proliferation assay using ARPE-19 cells. The ED50 for this effect is 0.3052 μg/mL, corresponding to a specific activity is 3276.54 units/mg.
Species

Human

Source

E. coli

Tag

Tag Free

Accession

P09382/NP_002296.1 (A2-D135)

Gene ID
Molecular Construction
N-term
LGALS1 (A2-D135)
Accession # P09382/NP_002296.1
C-term
Synonyms
Galectin-1; Gal-1; HLBP14; Galaptin; HBL; LGALS1
AA Sequence

ACGLVASNLNLKPGECLRVRGEVAPDAKSFVLNLGKDSNNLCLHFNPRFNAHGDANTIVCNSKDGGAWGTEQREAVFPFQPGSVAEVCITFDQANLTVKLPDGYEFKFPNRLNLEAINYMAADGDFKIKCVAFD

Molecular Weight

Approximately 15 kDa

Purity
  • Greater than 95% as determined by reducing SDS-PAGE.
Appearance

Lyophilized powder

Formulation

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4 or PBS, pH 7.4, 8% trehalose.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Storage & Stability

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation

Galectin-1/LGALS1 Protein, Human Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Activity Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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Galectin-1/LGALS1 Protein, Human
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HY-P73072
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