>7tvn_A mol:protein length:225 Viral chitosanase V-Csn D148N mutantHMSELSEIDSVAGVTIYSVDGEPKSFVYKAGFAIDADGAPNAYAPNNGGTDFTANGGDDQGGDWWGGPVDAEGYPIKQKIFDPFPGYYVSATAHFNPAYSEDSPYRYIDSNSIPFIVLPGNHSNGAKLGDVALVYNEKTGDNCYAIYGNVGPSSKIGEGSVRLAQALKIDDNPKAGGTESRIVVTLVFPGSVGKWETPKRWFSHANQLTKAWGGLSRLKTLSDQL