What does the TE (Elution) Buffer specifically aid in?

The TE (Elution) Buffer is specifically designed to facilitate the unbinding of proteins, including GFP, from the columns used during purification. This buffer typically contains components like Tris (to maintain pH stability) and EDTA (which chelates divalent cations). When used in the elution step, it helps to disrupt the interactions between the target protein and the chromatography matrix, allowing the purified GFP to be released and collected.

The role of the TE buffer in this context is crucial, as it not only helps in recovering the GFP but also ensures that the protein remains in a stable state during the elution process. While maintaining pH stability is an important consideration, the specific primary function of the TE buffer during elution is to promote the release of the bound GFP from the column, distinguishing it from other steps in the purification process.