MACROMOLECULES 



89 



Fig. 5 (Meyer and Bernfeld) — Structure of amylopectin. 

 o = a glucose residue. A = a reducing group. The dotted line shows the limit of 

 hydrolysis brought about by ^-amylase attacking the macromolecule at its surface. 



(d) Other polyglucoses — One finds in the biosphere a great variety of 

 these ; a few are given below : 



Lichenin from Hchens (straight chain; 30% of l:3-a; 70% of l:4-a) 

 Laminarin in the Laminaria (straight chain; l:3-j8; an average of 20 

 residues) 



V o\y glwQosts oi Bet abaci erium vermiforme (l:6-a; 25 residues) 



VoXyghicosts oi Phytomonas tumefaciens (1:2-/3; 22 residues) 



Polyglucoses of the cellular skeleton of yeast (36 residues) 



Polyglucoses of Leuconostoc mesenteroides (3-24 residues) 



Polyglucoses of L6«co«05foc dextranicum (straight chain; l:6-a; 200-500 

 residues) 



Fig. 6 (K. H. Meyer) — Structure of glycogen. 



