Used as a selective substrate in kinase activity assays, particularly for studying AKT (Protein Kinase B) signaling pathways. Enables detection and quantification of AKT enzyme activity in cell lysates or purified systems through phosphorylation-based readouts. Commonly applied in drug discovery to evaluate inhibitors targeting AKT, which plays a key role in cell survival, proliferation, and metabolism. Its trifluoroacetate salt form improves solubility and stability in aqueous buffers, making it suitable for in vitro biochemical assays.