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| Identifier | Description | 
|---|---|
| bigg.reaction:EX_hspg_e biggR:EX_hspg_e  | Heparan sulfate proteoglycan exchange 1 biggM:hspg@BOUNDARY = 1 biggM:hspg@biggC:e  | 
| bigg.reaction:HSPGtly biggR:HSPGtly  | Heparan sulfate transport, extracellular to lysosome 1 biggM:hspg@biggC:l = 1 biggM:hspg@biggC:e  | 
| bigg.reaction:HSPGt biggR:HSPGt  | Heparan sulfate transport, golgi to extracellular 1 biggM:hspg@biggC:e = 1 biggM:hspg@biggC:g  | 
| bigg.reaction:R_EX_hspg_e bigg.reaction:R_HSPGt bigg.reaction:R_HSPGtly biggR:R_EX_hspg_e biggR:R_HSPGt biggR:R_HSPGtly  | secondary/obsolete/fantasy identifier |