PTM - PHOSIDA Symbol Accession Code Position Surrounding Sequence Type Upf1 FBpp0073433 S 46 MPSTSQpSQTQNDQ phosphorylation Upf1 FBpp0073433 S 60 EIAQRCpSAGDSHP phosphorylation Upf1 FBpp0073433 S 70 SHPRLApSITNDLA phosphorylation