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The avermectin analog doramectin (CHC-B1), sold commercially as Dectomax TM , is biosynthesized by Streptomyces avermitilis. aveC, a gene encoding an unknown mechanistic function, plays an essential role in the production of doramectin (avermectin CHC-B1), modulating the production ratio of CHC-B1 to other avermectins, most notably the undesirable analog CHC-B2. To improve the production ratio...
Since most antibodies directed against protein antigens recognize epitopes composed of several discontinuous segments of the polypeptide chain, attempts to delineate the amino acids constituting these epitopes with the use of linear peptides have generally been unsuccessful. Here, a method is described based on error-prone PCR, phage display and negative selection, whereby amino acid residues constituting...
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