Proteins differentially phosphorylated in neuroblastoma cell line following ATRA treatment as identified by MALDI-Tof MS.

aSpot number were defined according to spot positions in 2-DE in Fig. 4.bMW, molecular weight.cpI, isoelectric point.dNumber of matched mass values on number of total mass values searched.eThe sequence coverage, which is calculated as the percentage of identified sequence to the complete sequence of the matched protein.fRatio between level of phosphorylation in treated and untreated cells. Standard deviation is indicated. For the significance two-sided Student's t test was used (* p