obsolete chitobiose phosphorylase activity (obsolete GO:0052756)
OBSOLETE. Catalysis of the reaction: chitobiose + phosphate = N-acetyl-D-glucosamine + N-acetyl-alpha-D-glucosamine 1-phosphate. This reaction is the phosphorolysis of chitobiose, (GlcNAc)2, a dimer of beta-(1->4) linked glucosamine units.