beta-mannosylphosphodecaprenol---mannooligosaccharide 6-mannosyltransferase; mannosylphospholipid-methylmannoside alpha-1,6-mannosyltransferase; beta-D-mannosylphosphodecaprenol:1,6-alpha-D-mannosyloligosaccharide 1,6-alpha-D-mannosyltransferase