BRT Biotechnologies is a drug-discovery tools company that designs and manufactures large, structurally diverse macrocyclic peptide libraries for pharmaceutical and biotech screening programs. Its proprietary BRiTeCycle platform uses spatially addressed synthesis to build libraries of 10,000 to 1 million non-canonical macrocycles in weeks rather than months or years, drawing on more than 60 unique alpha-, beta- and gamma-amino acid building blocks including N-alkylated and cyclic structures. The libraries are aimed at hard-to-drug targets in oncology and infectious disease and are sold both directly and through distribution partner Chem-Impex. The company was founded in 2021 by Pomona College chemist Jane Liu and Gregory Copeland and is based in Claremont, California.