Why is trypsin used with EDTA?
By Sarah Oconnor
Why is trypsin used with EDTA?
EDTA is a chelator that sequesters metal ions such as calcium and magnesium. EDTA enhances the cleavage ability of trypsin to help weaken cell adhesion in cell suspensions.
What is 1X trypsin-EDTA?
The typical use for this product is in removing adherent cells from a culture surface. The concentration of trypsin necessary to dislodge cells from their substrate is dependent primarily on the cell type and the age of the culture. Trypsin-EDTA Solution 1X has been used for dissociation/trypsinization of cells.
How much is trypsin?
Ordering information
| Catalog # | Name | Price (USD) |
|---|---|---|
| 27250018 | Trypsin (1:250), powder | 354.00 |
| 15050057 | Trypsin (0.25%), phenol red | 44.95 |
| 15050065 | Trypsin (0.25%), phenol red | 14.61 |
| 15090046 | Trypsin (2.5%), no phenol red | 36.55 |
How do you prepare trypsin-EDTA solution?
1. Pre-warm the 10x concentrated Trypsin/EDTA solution to 37ºC by placing in a water bath. 2. Once thawed, aseptically dilute 100ml of the 10x concentrated solution with 850ml of a sterile Ca2+- and Mg2+-free salt solution (e.g. Dulbecco´s PBS) and mix well.
How long can you leave cells in trypsin?
It depends on what cells you are using. If you are using confluent epithelial cells such as MDCK, it takes more than 10 min or even as long as 30 min to completely detach the cells from dish, and 30 min trypsinisation does not kill the cells.
How do you take trypsin EDTA?
Procedure
- Remove medium from culture vessel by aspiration and wash the monolayer with a salt solution free of Ca2+ and Mg2+ to remove all traces of serum.
- Dispense enough trypsin or trypsin/EDTA solution into culture vessel(s) to completely cover the monolayer of cells and place in 37 °C incubator for ~2 minutes.
How long can cells be in trypsin?
As Yutaka said, it depends entirely on your cell’s type. Average time is 5-10 min, it could be as long as 20 min in some epithelial cells and as low as 2 min in some stem cells. You have to look into the literature and check the time used for your particular cell type.
How do you store trypsin EDTA?
Storage: Store the Trypsin/EDTA solution at -20°C for long term storage. Once thawed, the product may be stored at 4°C for up to one month. Shipping: Dry ice. 1) Remove culture medium from culture vessels by aspiration and wash the cells with HBSS w/o Ca+2 and Mg+2 (cAP-11) to remove all traces of serum.
How much EDTA do you add to trypsin?
Ready-to-use 0.05% trypsin, 0.53 mm EDTA is commercially available (e.g., Invitrogen Life Technologies 25300-054). It is also possible to use 0.25% trypsin, 0.04% EDTA (e.g., Invitrogen Life Technologies 25200-056) for routine culture of ES cells.
What happens if you leave cells in trypsin for too long?
Incubating cells with too high a trypsin concentration for too long a time period will damage cell membranes and kill the cells. If unsure about the concentration of trypsin to use, start with a low concentration.
How long does it take for trypsin to work?
Hela cells and h292 cells are kept only for 2 minutes as they trypsinised fast. Most of the cells take 10-15 minutes in case of Hacat cells, hard cell lines.
