Ponceau S is a rapid and reversible stain for detecting protein bands on Western blot membranes and can be used with PVDF, nitrocellulose and cellulose acetate membranes*. Since, Ponceau-S staining is reversible, it allows further immunological detection.

What Colour does Ponceau stain the proteins on the membrane?

If the colour of Coomassie, as it says on the jar, is “brilliant blue,” although it has a different chemical structure, Ponceau can be described as “brilliant red.” A water-based solution of Ponceau S stains the protein bands on the membrane in a pinkish-red colour.

Does Ponceau fluoresce?

Even after thorough destaining, Ponceau stain can leave an autofluorescent residue on the membrane that increases background fluorescence.

Which is more sensitive Coomassie blue or Ponceau S?

Coomassie brilliant blue R250 and amido black 10B are more sensitive than Ponceau S2. However with Coomassie brilliant blue R250 the background staining is high and also this stain is not removed easily.

How do you stain nitrocellulose membrane?

Materials

1. Place blot transfer membrane in a plastic box.
2. Rinse with water four times for 5 min each.
3. Stain with SYPRO Ruby protein blot stain for 15 min.
4. Rinse with water four to six times for nitrocellulose and two to three times for PVDF for 1 min each, then air-dry.

Does Ponceau interfere with antibody binding?

Although the Ponceau stain should not block antibody binding, you can take a picture of the Ponceau stained membrane, and then remove the Ponceau by soaking in a large volume of water for a few minutes. Ponceau staining is just for checking the efficiency of transfer.

Why is silver staining more sensitive?

Silver staining is the most sensitive colorimetric method for detecting total protein. The development process is essentially the same as for photographic film: silver ions are reduced to metallic silver, resulting in a brown-black color. Example gel stained with SilverXpress Silver Staining Kit.

Is Ponceau stain reusable?

Destain in water until the background becomes clear [25]. Ponceau S stain is designed for rapid (5 min) staining on nitrocellulose or PVDF membranes [26]. Rapid (5 min) staining of protein bands on PVDF or nitrocellulose membranes. Staining is reversible by washing the membrane with 0.1 M NaOH for 1 min [27].

Can Ponceau staining of membranes be used as a loading control?

Because of these problems with housekeeping controls we have used ponceau staining as a loading control [7]. Several advantages of ponceau staining include the low cost, the fast staining time, and easy removal of the dye from the bound proteins.

Why do we stain with Ponceau S?

Strengths and limitations. Ponceau S stain enables the detection of proteins even at lower concentrations such as ranging from 1–10 μg protein. The staining method is rapid, sensitive, cheap, reversible, and easy-to-use.

How do you stain a membrane with Coomassie?

BASIC PROTOCOL 2: COOMASSIE BLUE R-250 STAINING

1. Place blot transfer membrane in a clear plastic box. Wash with water three times for 5 min each.
2. Stain membrane with Coomassie blue stain for 5 min.
3. Destain membrane with 50% methanol/7% acetic acid for 5 to 10 min.
4. Rinse with water several times, then air dry.

How do you stain A Ponceau S membrane?

Incubate membrane in Ponceau S Staining Solution for 5-10 minutes at room temperature. 3. Wash membrane in ddH 2 O until distinct reddish-pink protein bands are visible (1-5 min).

How to use Ponceau S staining solution for protein electrotransfer?

1. Following protein electrotransfer, rinse membrane briefly in ddH 2 O to remove any detergent that may inhibit staining. 2. Incubate membrane in Ponceau S Staining Solution for 5-10 minutes at room temperature. 3. Wash membrane in ddH 2 O until distinct reddish-pink protein bands are visible (1-5 min).

Can Ponceau stain be used on PVDF?

The product can be used on most membranes including PVDF (polyvinylidene difluoride) except nylon membranes. Ponceau S does not destain from nylon membranes because the nylon is positively charged, the stain is negatively charged, and therefore, the stain is electrostatically held.

When was the first Ponceau stain used?

It was first by O Salinovich and R C Montelaroused in 1986 as an alternative for Coomassie brilliant blue staining [1]. Ponceau is one of the many dyes used for staining of proteins. These dyes have different binding properties and detection limits.