Antibiotics, ionophores and

From the multitude of microbial peptides only a few selected compounds can be discussed here. Several biologically active substances will be treated, however, in subsequent chapters of this book, for instance peptide hormones in Chap. 7, antibiotics, ionophores and toxins in Chap. 9. Here we describe three long-known compounds which attracted the interest of the, at that time still small, circle of peptide chemists. 

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