👉 Maleate is a type of compound that contains one or more genders in its chemical structure. It is often associated with organic compounds, particularly those found in plants and algae. Maleates can be classified into two main groups, namely proanthocyanidins (PAs) and phycosides (PS). Proanthocyanidins are a class of phenolic compounds that contain one or more alpha-hydroxyalkanes as their primary structure unit; they are found in the leaves