3.2.1.162 delta-carrageenan + H2O Cga-L50 is an endo-type delta-carrageenase that hydrolyzes beta-1,4-linkages of kappa-carrageenan, yielding neo-delta-carrabiose as the main product 3.2.1.162 lambda-carrageenan + H2O sole known depolymerizing enzyme of lambda-carrageenan, hydrolyses the beta(1-4) linkage of lambda-carrageenan 3.2.1.162 lambda-carrageenan + H2O - 3.2.1.162 additional information kappa-, iota- and lambda-carrageenase display strict specificity for their substrates, namely kappa-, iota- and lambda-carrageenans, respectively. The enzymes discriminate the substrate probably by recognizing the sulfation pattern of the digalactose reapeting unit of the polysaccharide. lambda-Carrageenas present conserved arginine residues in the catalytic site which are believed to interact with carrageenans in which both sugar residues in the disaccharide units are negatively charged