PBS buffer, pH 6.8, is widely used in biological and biochemical research for maintaining stable pH conditions during experiments. It is commonly employed in cell culture applications to provide an isotonic environment that supports cell growth and viability. In immunoassays, such as ELISA, it serves as a washing buffer to remove unbound antibodies or antigens, ensuring accurate results. It is also utilized in protein purification processes to stabilize proteins and prevent denaturation. Additionally, PBS buffer, pH 6.8, is used in molecular biology techniques like gel electrophoresis and blotting to maintain consistent pH levels. Its compatibility with biological systems makes it a versatile choice for various laboratory applications.