Provided herein are compositions comprising trispecific and/or trivalent binding proteins comprising four polypeptide chains that form three antigen binding sites that specifically bind one or more HIV target proteins or one or more T-cell receptors, wherein a first pair of polypeptides forming the binding protein possess dual variable domains having a cross-over orientation and wherein a second pair of polypeptides forming the binding protein possess a single variable domain. Also provided herein are methods for making trispecific and/or trivalent binding proteins and uses of such binding proteins for the treatment and/or prevention of HIV/AIDS.本發明提供包含三特異性和/或三價結合蛋白的組合物,所述三特異性和/或三價結合蛋白包含形成3個抗原結合位點的4條多肽鏈,所述3個抗原結合位點特異性結合一個或多個HIV靶蛋白或一個或多個T細胞受體,其中形成所述結合蛋白的第一對多肽具有雙重可變域,其具有交叉(cross-over)取向,且其中形成所述結合蛋白的第二對多肽具有單一可變域。本文還提供用於製備三特異性和/或三價結合蛋白的方法和此類結合蛋白用於治療和/或預防HIV/AIDS的用途。