Strongly Pleated or Ribbon Type 1,4 linked a-D-galactopyranosyl-uronate units (4.115) 0 HO co9 HO (4.116 HO co?o Hollow Helix-Type 墓 家 b Fig.4.13.Stabilizatioin of helical conformations. a Clathrate compounds,b coiled double or triple helices,e"nesting"(according to Rees,1977) 1313 Strongly Pleated or Ribbon Type 1,4 linked a-D-galactopyranosyl-uronate units Hollow Helix-Type N = number of monomer per turn