Flow Cytometry Staining Buffer (FACS Buffer) staining protocols, antibody and cell dilution steps, wash steps required for surface staining and flow cytometric analysis. The buffer contains sodium azide as preservative and animal serum proteins (FBS/BSA) to help minimizing non-specific binding of antibodies.
How do you make a FACS staining buffer?
5 Ingredients to Consider in FACS Buffer
- 2- Supplement with FCS (1-10%) or BSA (0.1-1%) Serum proteins protect cells from apoptosis, prevent non-specific staining and also prevent cells from sticking to the FACS tubes.
- 3- Include EDTA (0.5-5 mM)
- 4- Slip in some DNase I (25-50µg/ml)
- 5- Add sodium azide (0.1-1%)
What is PBS in flow cytometry?
Phosphate-Buffered Saline (PBS) is a balanced salt solution used for a variety of applications, including reagent preparation, diluting cells for flow cytometry and as a cell culture reagent. This Gibco® PBS is formulated without calcium and magnesium for suspending cells for flow cytometry.
How do you make a flow cytometry buffer?
Add 10 g of bovine serum albumin to 700 mL of amphibian phosphate-buffered saline (APBS). Stir well until dissolved. Add 50 µL of 1 m sodium azide.
How many cells do you need for FACS staining?
For each sample, you will need between 10^5 and 10^6 cells. If you are new to flow cytometry, use the higher number of cells — to give yourself a margin for error (you always lose more cells than you expect during the staining and washing procedures).
How do you make a Mac buffer?
Buffer: Prepare a solution containing phosphate-buffered saline (PBS) pH 7.2, 0.5% bovine serum albumin (BSA), and 2 mM EDTA by diluting MACS BSA Stock Solution (# 130-091-376) 1:20 with autoMACS® Rinsing Solution (# 130-091-222). Keep buffer cold (4−8 °C).
How much sodium azide is in a FACS buffer?
Harvest, wash the cells (single cell suspension) and adjust cell number to a concentration of 1-5×106 cells/ml in ice cold FACS Buffer (PBS, 0.5-1% BSA or 5-10% FBS, 0.1% NaN3 sodium azide*).
How do I create a buffer solution in PBS?
- Prepare 800 mL of distilled water in a suitable container.
- Add 8 g of NaCl to the solution.
- Add 200 mg of KCl to the solution.
- Add 1.44 g of Na2HPO4 to the solution.
- Add 245 mg of KH2PO4 to the solution.
- Adjust solution to desired pH (typically pH ≈ 7.4).
How do you dissolve BSA in PBS?
For a solution of 1% BSA in PBS, add 1 g of BSA (Fraction V) to 100 ml of PBS. Allow to dissolve. If desired, add 0.2 ml of 10% sodium azide.
How do you stain flow cytometry?
Dilute the appropriate fluorochrome-labeled secondary reagent in 100 µL of Flow Cytometry Staining Buffer and add to the cells. Incubate for at least 30 minutes at 2-8 °C or on ice. Protect from light. Wash the cells by adding Flow Cytometry Staining Buffer.
How long is MACS buffer Good For?
The expiration date is indicated on the bottle label. After opening the autoMACS Running Buffer should be stored refrigerated (2–8 °C) and used within 3 days.
Why is sodium azide added to FACS wash buffer?
Flow Cytometry Staining Buffer (FACS Buffer) The buffer contains sodium azide as preservative and animal serum proteins (FBS/BSA) to help minimize non-specific binding of antibodies. The addition of EDTA prevents cell to cell adhesion and clumping.
What is the percentage of BSA in PBS in FACS buffer?
Usually Facs Buffer is PBS 1%BSA (or 4%FCS) 0,05% Sodium Azide. For any kind of study whether surface or intracellular staining cells should be washed in PBS. During the staining process we should use FACS buffer containing 2-3 % of BSA in PBS or 5% of FBS in PBS.
What is the correct buffer for FACs staining?
Usually Facs Buffer is PBS 1%BSA (or 4%FCS) 0,05% Sodium Azide. For any kind of study whether surface or intracellular staining cells should be washed in PBS.
Should I resuspend cells in PBS or FACs buffer?
If you want to keep the cells happier though, resuspending them in facs buffer is highly recommended. Although mostly facs buffer is 5% FBS in PBS, as pointed out by many here, I have seen people use 2% FBS in PBS too.
Should surface or intracellular staining cells be washed in PBS?
For any kind of study whether surface or intracellular staining cells should be washed in PBS. During the staining process we should use FACS buffer containing 2-3 % of BSA in PBS or 5% of FBS in PBS. Due to presence of BSA or other proteins of FBS cells get stable and less sensitive to damage.
