S1 Electronic Supplementary Information Synthesis of Homogeneous MUC1 Oligomers via a Bi-Directional Ligation Strategy Dima Al Sheikha, Brendan L. Wilkinson, Gajan Santhakumar, Morten Thaysen-Andersen and Richard J. Payne* School of Chemistry, The University of Sydney, NSW 2006, AUSTRALIA *richard.payne@sydney.edu.au Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry This journal is © The Royal Society of Chemistry 2013