mannosyltransferase activity beta-mannosylphosphodecaprenol-mannooligosaccharide 6-mannosyltransferase activity https://github.com/geneontology/go-ontology/issues/30193 GO:0047252 EC:2.4.1.199 Catalysis of the reaction: (1->6)-alpha-D-mannosyloligosaccharide + beta-D-mannosylphosphodecaprenol = (1->6)-alpha-D-mannosyl-(1->6)-alpha-D-mannosyl-oligosaccharide + decaprenol phosphate. molecular_function beta-D-mannosylphosphodecaprenol:1,6-alpha-D-mannosyloligosaccharide 1,6-alpha-D-mannosyltransferase activity mannosylphospholipid-methylmannoside alpha-1,6-mannosyltransferase activity MetaCyc:2.4.1.199-RXN