Determination of regulatory phosphorylation sites in nanogram amounts of a synthetic fragment of ZAP-70 using microprobe NMR and on-line coupled capillary HPLC-NMR - Hentschel,P.; Krucker,M.; Grynbaum,M.D.; Putzbach,K.; Bischoff,R.; Albert,K. (Magn Reson Chem, 2005)