TY - RPRT TI - O-Phosphorylated and unphosphorylated peptide-substrates suitable for tryptic action. AU - D THEODOROPOULOS AU - H BENNICH AU - O MELLANDER PY - 1959 DO - 10.1038/184270a0 UR - https://pubmed.ncbi.nlm.nih.gov/13837708/ ID - 13837708 ER -