Magigene Biotechnology_Microbiome-Microorganisms MAGIGENE has been authorized by Sun Yat-sen University for the use of patent Preparation and Use of Inducible Mutant Protein Based on Activation of Inducible Cytidine Deaminase This system allows us to mutate the CDR sequence of VHH By continuously mutating the yeast, we generate a diverse VHH library from which we can extract antigen-specific VHH using the yeast surface display method