Human LAG3 HEK293 Overexpression Lysate: Product Information
This Human LAG3 overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of LAG3 protein (Cat: 16498-H05H) from the overexpression lysate was verified.
A DNA sequence encoding the human LAG3 (NP_002277.4) (Met1-Leu450) was expressed with the Fc region of mouse IgG1 at the C-terminus.
The recombinant human LAG3 consists of 656 amino acids and predicts a molecular mass of 72 kDa.
Human LAG3 HEK293 Overexpression Lysate: Usage Guide
Cell lysate was prepared by homogenization of the over-expressed cells in ice-cold modified RIPA Lysis Buffer with cocktail of protease inhibitors (Sigma). Cell debris was removed by centrifugation. Protein concentration was determined by Bradford assay (Bio-Rad protein assay, Microplate Standard assay). The cell lysate was boiled for 5 min in 1 x SDS loading buffer (50 mM Tris-HCl pH 6.8, 12.5% glycerol, 1% sodium dodecylsulfate, 0.01% bromophenol blue) containing 5% b-mercaptoethanol, and lyophilized.
1. Centrifuge the tube for a few seconds and ensure the pellet at the bottom of the tube.
2. Re-dissolve the pellet using 200μL pure water and boil for 2-5 min.
1 X Sample Buffer (1 X modified RIPA buffer+1 X SDS loading buffer).
Stability & Storage
Store at 4℃ for up to twelve months from date of receipt. After re-dissolution, aliquot and store at -80℃ for up to twelve months. Avoid repeated freeze-thaw cycles.
Western Blot (WB) Optimal dilutions/concentrations should be determined by the end user.
Human LAG3 HEK293 Overexpression Lysate: Alternative Names
Human CD223 Overexpression Lysate; Human LAG-3 Overexpression Lysate
LAG3 Background Information
LAG3, also known as CD223 and Lymphocyte activation gene 3, belongs to immunoglobulin (Ig) superfamily. LAG3 contains 4 extracellular Ig-like domains. The LAG3 gene contains 8 exons. It is selectively expressed in activated T and NK cells. LAG3 has a negative regulatory function in T cells. It also acts as as a new marker of T cell induced B cell activation. As a soluble molecule, LAG3 activates antigen-presenting cells through MHC class II signalling, leading to increased antigen-specific T-cell responses in vivo.
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