Copy Number Analysis of the Yeast Histone Deacetylase Complex Component Cti6 Directly in Living Cells.

Proteins are one of the key components of cellular life that play a crucial role in most biological processes. Therefore, quantification of protein copy numbers is essential for revealing and better understanding of cellular behavior and functions. Here we describe a single-molecule fluorescence-based method of protein copy number quantification directly in living cells. This enables quick and reliable estimations and comparison of the protein of interest abundance without implementing large-scale studies.