TY - RPRT TI - Substrate 2'-hydroxyl groups required for ribozyme-catalyzed polymerization. AU - Ulrich F Müller AU - David P Bartel PY - 2003 DO - 10.1016/s1074-5521(03)00171-6 UR - https://pubmed.ncbi.nlm.nih.gov/14522050/ ID - 14522050 ER -