Dear all, is anyone aware of a way to selectively protect the carboxylate at a protein C-terminus, while leaving unaffected those of Asp and Glu side chains? Thanks a lot in advance, have a nice weekend, ciao, s -- Sebastiano Pasqualato, PhD Crystallography Unit Department of Experimental Oncology European Institute of Oncology IFOM-IEO Campus via Adamello, 16 20139 - Milano Italy tel +39 02 9437 5167 fax +39 02 9437 5990