the observed results support the hypothesis that in the mnn 1 the mutation has altered the structural gene involved in biosynthesis of an alpha ( 1 leads to 3 ) mannosyl transferase catalyzing the addition of alpha ( 1 leads to 3 ) linked mannosyl units to alpha ( 1 leads to 2 ) linked mannotrioses in the polysaccharide side chains and in the oligosaccharides attached to serine and/or threonine in the protein part of mannan molecule .
C0032594
polysaccharide
C0028959
oligosaccharides