Amino acid sequence analysis of POSWOI. A: POSWOI consists of 20 amino acid signal sequences (SS), a family 1 carbohydrate-binding module (CBM1), a linker region and a family 45 endoglucanase-like domain. Double-headed arrows indicate the disulfide bonds. B: alignment of P. oxalicum swollenin (Poswo, GeneBank No. ADZ74267) with three other swollenins from Trichoderma reesei (Trswo, GeneBank No. CAB92328), Penicillium decumbens (Pdswo, GeneBank No. ACH57439), and Aspergillus fumigatus (Afswo, GeneBank No. XP_747748), respectively. Identical amino acids are shaded. Numbers show the position of amino acids.