Abcam, ab213785, Human Galectin-4 ELISA Kit

Size: 1 x 96Tests
Human Galectin-4 ELISA Kit is a Sandwich (quantitative) ELISA for the measurement of Human Galectin-4 in Human in Cell/Tissue Extracts, Cell Culture Media, Biofluids samples.
Key facts
Detection method:Colorimetric,
Sample types:Cell Lysate, Cell culture supernatant, EDTA Plasma, Heparin Plasma, Serum,
Reacts with:Human,
Assay type:Sandwich (quantitative),
Sensitivity:< 10 pg/mL,
Range:31.2 - 2000 pg/mL,
Assay time:3h 30m,
Assay Platform:Pre-coated microplate (12 x 8 well strips)

Product details:
The Human Galectin-4 Enzyme-Linked Immunosorbent Assay (ELISA) kit (ab213785) is designed for the quantitative measurement of Human Galectin-4 in cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA).
The ELISA kit is based on standard sandwich enzyme-linked immune-sorbent assay technology. A monoclonal antibody from mouse specific for Galectin-4 has been pre-coated onto 96-well plates. Standards (Expression system for standard:
E.coli
; Immunogen sequence: A2-I323) and test samples are added to the wells, a biotinylated detection polyclonal antibody from goat specific for Galectin-4 is added subsequently and then followed by washing with PBS or TBS buffer. Avidin-Biotin-Peroxidase Complex is added and unbound conjugates are washed away with PBS or TBS buffer. HRP substrate TMB is used to visualize HRP enzymatic reaction. TMB is catalyzed by HRP to produce a blue color product that changed into yellow after adding acidic stop solution. The density of yellow is proportional to the Human Galectin-4 amount of sample captured in plate.
Galectin-4, also known as LGALS4 or GAL4, is a protein that in humans is encoded by the LGALS4 gene. It is mapped to 19q13.2. Galectins are a family of animal lectins defined by an affinity for beta galactoside-containing saccharides and by shared sequence elements. Galectin-4 is expressed as a 38-kD protein in the human colon adenocarcinoma T84 cell line. Galectin-4 is an S-type lectin that is strongly under expressed in colorectal cancer, and this gene plays a role in cell adhesion. It has been found that decreased Galectin-4 expression occurs early in colorectal carcinogenesis.

Properties and Storage Information:
Shipped at conditions-Blue Ice, Appropriate short-term storage conditions--20°C, Appropriate long-term storage conditions--20°C, Storage information--20°C

Supplementary Information:
This supplementary information is collated from multiple sources and compiled automatically.
GAL4 also known as a transcription factor is an important protein in yeast. It plays a critical role in regulating the transcription of genes involved in galactose metabolism. The GAL4 protein has a mass of approximately 881 amino acids and is mainly expressed in the nucleus of yeast cells. Common parts of GAL4 include the GAL4 DBD (DNA-binding domain) and GAL4 AD (activation domain) which are critical for its function. Although similar sounding GAL4 should not be confused with galectin-4 or galectin 4 which are different proteins.
Biological function summary
The GAL4 transcription factor functions as a major regulator of galactose-responsive genes. It acts as part of a complex binding with its DNA target sites to initiate transcription of GAL genes like GAL1 GAL7 and GAL10. GAL4 protein recruits transcriptional machinery through its activation domain working alongside other factors to turn on specific gene expression in response to the presence of galactose. This capacity for gene regulation underlines its essential role in sugar metabolism in yeast.
Pathways
GAL4 is intimately involved in the GAL gene regulatory pathway that manages the cellular response to galactose. In this pathway proteins such as GAL80 inhibit GAL4 function under non-inducing conditions. However in the presence of galactose GAL3 binds and neutralizes GAL80 liberating GAL4 to activate gene expression. This system exemplifies a dynamic interaction in yeast allowing precise gene regulation in accordance with sugar availability.
While GAL4 is specifically a yeast protein and does not directly relate to human diseases its functional analogs and concepts have implications in genetic research and synthetic biology. For example GAL4 system is widely used in Drosophila and other model organisms to study gene expression patterns and related disorders. This system compared with mammalian transcription factors provides a foundational methodology for exploring genetic regulation mechanisms and potential implications in understanding metabolic disorders.