Table 1. Predicted posttranslational modifications and their sequence positions in the SP-G model.

sequenceposition	Ser17	Asn37	Tyr40	Ser62	Ser70	Cys76	Thr78
modification	PHOS	N-GLYC	PHOS	O-GLYC	O-GLYC	PALM	O-GLYC

Present modification types: phosphorylation (PHOS), palmitoylation (PALM), O-glycosylation with GlcNAc (O-GLYC), and N-glycosylation with a pentasaccaride core consisting of 2 GlcNAc and 3 mannose moieties (N-GLYC).