Human IFN-γ1b, premium grade130-096-484
产品说明
Background information
IFN-γ, the only type II interferon, possesses potent anti-viral activity and immunoregulatory properties. It is structurally unrelated to the type I interferons and binds to a different receptor expressed by most immune cells. IFN-γ is produced predominantly by NK cells and T cells. IFN-γ enhances NK cell and macrophage activity and regulates B cell functions, like immunglobulin production and class switching. In addition, IFN-γ orchestrates leukocyte attraction and directs growth, maturation, and differentiation of many cell types. The activity of human IFN-γ is species-specific.
Biological activity
Proliferation of HT-29 cells (NIAID Gxg01-902-535)
research grade: ≥ 1×107 IU/mg
premium grade: ≥ 2×107 IU/mg
Quality description
Research-grade cytokines are suitable for a wide variety of cell culture applications. They are sterile-filtered prior to lyophilization. Generally, endotoxin levels are <0.1 ng/μg (<1 EU/μg), and purities are >95%. The biological activity is tested in appropriate bioassays.
Premium-grade cytokines offer the convenience of high and well-defined biological activities and allow exact unit dosing for demanding applications. The biological activity is determined after lyophilization and reconstitution, and normalized to WHO/NIBSC standards whenever available. In general, endotoxin levels are <0.01 ng/μg (<0.1 EU/μg), and purities are >97%. Lot-specific certificates of analysis are available on request (macstec@miltenyibiotec.de).
相关图片
Human IFN-γ1b activity assay. The biological activity of Human IFN-γ1b is determined by inhibition assay using HT-29 cells. Activity of Human IFN-γ1b, premium grade (red line) was compared to another commercially available product (black line).
SDS-PAGE of Human IFN-γ1b, premium grade under reduced (R) and non-reduced (NR) conditions.
Human IFN-γ1b biological activity. Activity of Human IFN-γ1b, premium grade, (red bar) was compared to another commercially available product (black bar).
Mass spectrometry analysis (ESI-MS) of Human IFN-γ1b, premium grade. The peak corresponds to the calculated molecular mass of 16334 Da.