Used in research settings to detect and quantify plant zein nucleoside (ZR) levels in biological samples. Commonly applied in plant physiology studies to monitor cytokinin activity, which plays a key role in cell division, shoot initiation, and leaf senescence. The ELISA format allows for high sensitivity and specificity, making it suitable for analyzing ZR in plant tissues, extracts, or culture media. Widely used in agricultural research, phytohormone studies, and developmental biology to understand plant growth regulation under various environmental or experimental conditions.