What organelles stain of bromophenol blue?

Bromophenol blue is a pH indicator that stains proteins, making it useful for visualizing organelles such as the endoplasmic reticulum and Golgi apparatus in cells. These organelles often contain a high concentration of proteins, which can be detected when stained with bromophenol blue. Additionally, the cytoplasm may also exhibit staining due to its protein content. However, it is important to note that bromophenol blue is not specific to any organelle and can stain various cellular components.