At4g16590 CSLA1 553 Probable mannan synthase 1 FCAALL.402 dl4320w Cellulose synthase-like protein A1 CSLA1_ARATH MSLFLKPFLFLYDTTLSLLLLLFNGWSLEDTAAAQKRREADKNAAETEWIQLQYLWTKTRSVVLLPVFKGLVVMCLVLSIIVFFESFYMNFVILFVKLFKRKPHKVYKWEAMQEDVEVGPDNYPMVLIQIPMYNEKEVFQLSIAAICSLVWPSSRLVVQVVDDSTDPAVREGVDVEIAKWQSQGINIRCERRDNRNGYKAGAMKEALTQSYVKQCDFVAVFDADFQPEPDYLIRAVPFLVHNPDVALVQARWIFVNANKCLMTRMQEMSLNYHFKVEQESGSTRHAFFGFNGTAGVWRISAMEAAGGWKSRTTVEDMDLAVRVGLHGWKFVYLNDLTVRNELPSKFKAYRFQQHRWSCGPANLFRKMTMEIIFNKRVSIWKKFYVIYSFFFVRKVAVHFLTFFFYCIIVPTSVFFPEIHIPSWSTIYVPSLISIFHTLATPRSFYLVIFWVLFENVMAMHRTKGTCIGLLEGGRVNEWVVTEKLGDALKSKLLSRVVQRKSCYQRVNSKEVMVGVYILGCALYGLIYGHTWLHFYLFLQATAFFVSGFGFVGT Probable mannan synthase which consists of a 4-beta- mannosyltransferase activity on mannan using GDP-mannose. The beta-1,4-mannan product is the backbone for galactomannan synthesis by galactomannan galactosyltransferase. Galactomannan is a noncellulosic polysaccharides of plant cell wall (By similarity).