Datenblatt

Biologische Beschreibung

Spezifität	HIF-2α Antibody [J7H2] erkennt endogene Spiegel des gesamten HIF-2α-Proteins.
Hintergrund	Zellen, Gewebe und Organismen erfahren sowohl unter physiologischen als auch unter pathologischen Bedingungen reduzierte Sauerstoffwerte oder „Hypoxie“. Während der frühen Embryonalentwicklung führt die schnelle Proliferation von Zellen zu einem Zustand physiologischer Hypoxie, die die Bildung des hämatopoetischen und des Kreislaufsystems vorantreibt. Die Hypoxie-induzierbaren Faktoren (HIFs) sind kritische Mediatoren der zellulären und systemischen adaptiven Reaktion auf geringe Sauerstoffverfügbarkeit. Diese heterodimeren Proteine gehören zur Familie der Transkriptionsfaktoren mit basischer Helix-Loop-Helix (bHLH)/Per-Arnt-Sim (PAS)-Domäne. Unter normalen Sauerstoffbedingungen (Normoxie) werden HIF-α-Untereinheiten an spezifischen Prolinresten hydroxyliert, was die Erkennung durch den von Hippel-Lindau (pVHL)-Tumorsuppressor ermöglicht. Als Teil eines E3-Ubiquitinligase-Komplexes zielt pVHL auf HIF-α zur proteasomalen Degradation ab. HIF-2α, auch bekannt als endotheliales PAS-Domänenprotein 1 (EPAS1), HIF-ähnlicher Faktor (HLF), HIF-verwandter Faktor (HRF) oder Mitglied der PAS-Superfamilie 2 (MOP2), wird in den Parenchym- und Interstitialzellen verschiedener Organe exprimiert. Seine Störung führt zu embryonaler Letalität, was seine wesentliche Rolle in der Entwicklung unterstreicht. HIF-2α wird auch häufig in soliden Tumoren exprimiert.

Spezifität

HIF-2α Antibody [J7H2] erkennt endogene Spiegel des gesamten HIF-2α-Proteins.

Hintergrund

Zellen, Gewebe und Organismen erfahren sowohl unter physiologischen als auch unter pathologischen Bedingungen reduzierte Sauerstoffwerte oder „Hypoxie“. Während der frühen Embryonalentwicklung führt die schnelle Proliferation von Zellen zu einem Zustand physiologischer Hypoxie, die die Bildung des hämatopoetischen und des Kreislaufsystems vorantreibt. Die Hypoxie-induzierbaren Faktoren (HIFs) sind kritische Mediatoren der zellulären und systemischen adaptiven Reaktion auf geringe Sauerstoffverfügbarkeit. Diese heterodimeren Proteine gehören zur Familie der Transkriptionsfaktoren mit basischer Helix-Loop-Helix (bHLH)/Per-Arnt-Sim (PAS)-Domäne. Unter normalen Sauerstoffbedingungen (Normoxie) werden HIF-α-Untereinheiten an spezifischen Prolinresten hydroxyliert, was die Erkennung durch den von Hippel-Lindau (pVHL)-Tumorsuppressor ermöglicht. Als Teil eines E3-Ubiquitinligase-Komplexes zielt pVHL auf HIF-α zur proteasomalen Degradation ab. HIF-2α, auch bekannt als endotheliales PAS-Domänenprotein 1 (EPAS1), HIF-ähnlicher Faktor (HLF), HIF-verwandter Faktor (HRF) oder Mitglied der PAS-Superfamilie 2 (MOP2), wird in den Parenchym- und Interstitialzellen verschiedener Organe exprimiert. Seine Störung führt zu embryonaler Letalität, was seine wesentliche Rolle in der Entwicklung unterstreicht. HIF-2α wird auch häufig in soliden Tumoren exprimiert.

Nutzungsinformationen

Anwendung

WB

Verdünnung

WB

1:1000

Reaktivität

Human, Rat

Quelle

Mouse Monoclonal Antibody

MW

96 kDa

Lagerpuffer

PBS, pH 7.2+50% Glycerol+0.05% BSA+0.01% NaN₃

Lagerung
(Ab dem Datum des Erhalts)

-20°C (avoid freeze-thaw cycles), 2 years

Experimentelle Methoden
WB	Experimental Protocol: Sample preparation 1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/Nuclear Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature or lyse it by sonication on ice, then incubate on ice for 30 minutes. 2. Adherent cell: Aspirate the culture medium and transfer the cells into an EP tube. Wash the cells with ice-cold PBS twice. Add an appropriate volume of RIPA/Nuclear Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes. 3. Suspension cell: Transfer the culture medium to a pre-cooled centrifuge tube. Centrifuge and aspirate the supernatant. Wash the cells with ice-cold PBS twice.Add an appropriate volume of RIPA/Nuclear Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes. 4. Place the lysate into a pre-cooled microcentrifuge tube. Centrifuge at 4°C for 15 min. Collect the supernatant; 5. Remove a small volume of lysate to determine the protein concentration; 6. Combine the lysate with protein loading buffer. Boil 20 µL sample under 95-100°C for 5 min. Centrifuge for 5 min after cool down on ice. Electrophoretic separation 1. According to the concentration of extracted protein, load appropriate amount of protein sample and marker onto SDS-PAGE gels for electrophoresis. Recommended separating gel (lower gel) concentration: 10%. Reference Table for Selecting SDS-PAGE Separation Gel Concentrations 2. Power up 80V for 30 minutes. Then the power supply is adjusted (110 V~150 V), the Marker is observed, and the electrophoresis can be stopped when the indicator band of the predyed protein Marker where the protein is located is properly separated. (Note that the current should not be too large when electrophoresis, too large current (more than 150 mA) will cause the temperature to rise, affecting the result of running glue. If high currents cannot be avoided, an ice bath can be used to cool the bath.) Transfer membrane 1. Take out the converter, soak the clip and consumables in the pre-cooled converter; 2. Activate PVDF membrane with methanol for 1 min and rinse with transfer buffer; 3. Install it in the order of "black edge of clip - sponge - filter paper - filter paper - glue -PVDF membrane - filter paper - filter paper - sponge - white edge of clip"; 4. The protein was electrotransferred to PVDF membrane. ( 0.45 µm PVDF membrane is recommended ) Reference Table for Selecting PVDF Membrane Pore Size Specifications Recommended conditions for wet transfer: 200 mA, 120 min. ( Note that the transfer conditions can be adjusted according to the protein size. For high-molecular-weight proteins, a higher current and longer transfer time are recommended. However, ensure that the transfer tank remains at a low temperature to prevent gel melting.) Block 1. After electrotransfer, wash the film with TBST at room temperature for 5 minutes; 2. Incubate the film in the blocking solution for 1 hour at room temperature; 3. Wash the film with TBST for 3 times, 5 minutes each time. Antibody incubation 1. Use 5% skim milk powder to prepare the primary antibody working liquid (recommended dilution ratio for primary antibody 1:1000), gently shake and incubate with the film at 4°C overnight; 2. Wash the film with TBST 3 times, 5 minutes each time; 3. Add the secondary antibody to the blocking solution and incubate with the film gently at room temperature for 1 hour; 4. After incubation, wash the film with TBST 3 times for 5 minutes each time. Antibody staining 1291. Add the prepared ECL luminescent substrate (or select other color developing substrate according to the second antibody) and mix evenly; 2. Incubate with the film for 1 minute, remove excess substrate (keep the film moist), wrap with plastic film, and expose in the imaging system. (Exposure time of at least 90s is recommended)

Experimentelle Methoden

WB

Experimental Protocol:

Sample preparation

1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/Nuclear Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature or lyse it by sonication on ice, then incubate on ice for 30 minutes.

2. Adherent cell: Aspirate the culture medium and transfer the cells into an EP tube. Wash the cells with ice-cold PBS twice. Add an appropriate volume of RIPA/Nuclear Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes.

3. Suspension cell: Transfer the culture medium to a pre-cooled centrifuge tube. Centrifuge and aspirate the supernatant. Wash the cells with ice-cold PBS twice.Add an appropriate volume of RIPA/Nuclear Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes.

4. Place the lysate into a pre-cooled microcentrifuge tube. Centrifuge at 4°C for 15 min. Collect the supernatant;

5. Remove a small volume of lysate to determine the protein concentration;

6. Combine the lysate with protein loading buffer. Boil 20 µL sample under 95-100°C for 5 min. Centrifuge for 5 min after cool down on ice.

Electrophoretic separation

1. According to the concentration of extracted protein, load appropriate amount of protein sample and marker onto SDS-PAGE gels for electrophoresis. Recommended separating gel (lower gel) concentration: 10%. Reference Table for Selecting SDS-PAGE Separation Gel Concentrations

2. Power up 80V for 30 minutes. Then the power supply is adjusted (110 V~150 V), the Marker is observed, and the electrophoresis can be stopped when the indicator band of the predyed protein Marker where the protein is located is properly separated. (Note that the current should not be too large when electrophoresis, too large current (more than 150 mA) will cause the temperature to rise, affecting the result of running glue. If high currents cannot be avoided, an ice bath can be used to cool the bath.)

Transfer membrane

1. Take out the converter, soak the clip and consumables in the pre-cooled converter;

2. Activate PVDF membrane with methanol for 1 min and rinse with transfer buffer;

3. Install it in the order of "black edge of clip - sponge - filter paper - filter paper - glue -PVDF membrane - filter paper - filter paper - sponge - white edge of clip";

4. The protein was electrotransferred to PVDF membrane. ( 0.45 µm PVDF membrane is recommended ) Reference Table for Selecting PVDF Membrane Pore Size Specifications

Recommended conditions for wet transfer: 200 mA, 120 min.

( Note that the transfer conditions can be adjusted according to the protein size. For high-molecular-weight proteins, a higher current and longer transfer time are recommended. However, ensure that the transfer tank remains at a low temperature to prevent gel melting.)

Block

1. After electrotransfer, wash the film with TBST at room temperature for 5 minutes;

2. Incubate the film in the blocking solution for 1 hour at room temperature;

3. Wash the film with TBST for 3 times, 5 minutes each time.

Antibody incubation

1. Use 5% skim milk powder to prepare the primary antibody working liquid (recommended dilution ratio for primary antibody 1:1000), gently shake and incubate with the film at 4°C overnight;

2. Wash the film with TBST 3 times, 5 minutes each time;

3. Add the secondary antibody to the blocking solution and incubate with the film gently at room temperature for 1 hour;

4. After incubation, wash the film with TBST 3 times for 5 minutes each time.

Antibody staining

1291. Add the prepared ECL luminescent substrate (or select other color developing substrate according to the second antibody) and mix evenly;

2. Incubate with the film for 1 minute, remove excess substrate (keep the film moist), wrap with plastic film, and expose in the imaging system. (Exposure time of at least 90s is recommended)

Referenzen

https://pubmed.ncbi.nlm.nih.gov/18259197/

Anwendungsdaten

WB

Validiert von Selleck

Lane 1: HeLa
Lane 2: HeLa (DFO, 0.5mM)