TY - GEN AU - Busman,M AU - Schey,K L AU - Oatis,J E AU - Knapp,D R TI - Identification of phosphorylation sites in phosphopeptides by positive and negative mode electrospray ionization-tandem mass spectrometry SN - 1044-0305 PY - 2013///1111 N1 - Publication Type: Journal Article UR - https://doi.org/10.1016/1044-0305(95)00675-3 ER -