Used in plant biology research to measure levels of protoporphyrinogen oxidase (PPOX), an enzyme involved in chlorophyll and heme biosynthesis. This ELISA kit enables scientists to quantify PPOX protein in plant tissue extracts, helping study plant responses to environmental stress, herbicide exposure, and mutations affecting photosynthesis. It is particularly useful in developing and analyzing herbicide-resistant crops, as PPOX is a target site for certain herbicides. The assay supports high-throughput screening in agricultural biotechnology and physiological studies.