Used in research to study angiotensin II receptor interactions, particularly AT1 and AT2 subtypes, due to its modified structure that enhances receptor binding specificity. Helps investigate signal transduction pathways involved in blood pressure regulation and cardiovascular function. Commonly employed in radiolabeled or fluorescently labeled forms for receptor binding assays and cellular localization studies. Its sarcosine and glycine substitutions improve metabolic stability, making it suitable for in vitro pharmacological experiments.