Band III protein, also known as anion exchanger 1 (AE1), is a vital component of red blood cells, responsible for facilitating the exchange of bicarbonate and chloride ions across the cell membrane. While the term "Band III protein" is commonly used, there exist a few synonyms that can be employed to refer to this critical protein. One synonym is solute carrier family 4 member 1 (SLC4A1), which highlights its role as a carrier molecule. Another term used interchangeably with Band III protein is erythrocyte membrane protein band 3, emphasizing its location in the red blood cell membrane. Overall, these synonyms enhance our understanding of the multifaceted functions and significance of Band III protein in various biological processes.