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| Identifier | Description | 
|---|---|
| bigg.reaction:GALNTg biggR:GALNTg  | GalNAc transferase, Golgi apparatus 1 biggM:h@biggC:g + 1 biggM:Tn_antigen@biggC:g + 1 biggM:udp@biggC:g = 1 biggM:Ser_Thr@biggC:g + 1 biggM:udpacgal@biggC:g  | 
| bigg.reaction:NAGA2ly biggR:NAGA2ly  | N-acetylgalactosaminidase, alpha- 1 biggM:Ser_Thr@biggC:l + 1 biggM:udpacgal@biggC:l = 1 biggM:Tn_antigen@biggC:l + 1 biggM:h@biggC:l + 1 biggM:udp@biggC:l  | 
| bigg.reaction:R_GALNTg bigg.reaction:R_NAGA2ly biggR:R_GALNTg biggR:R_NAGA2ly  | secondary/obsolete/fantasy identifier |