5416
Mapping of rat striatal DAT phosphopeptides by two - dimensional thin layer chromatography revealed basal and PKC - stimulated phosphorylation of the same peptide fragments and comigration of PKC - stimulated phosphopeptide fragments with NDAT Ser - 7 phosphopeptide markers .
 Chemical: Ser
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Ser