Amino acids in the life sciences

Numerous natural peptides with antibiotic activity and other intensely potent physiological actions incorporate a- and higher amino acids, as well as highly processed coded amino acids. The microcystins, which act as hepatotoxins, provide one 

Mentioned elsewhere in this chapter, as examples that are ot-amino acids and also y-, (3-and 8-amino acids, respectively, are 

C6H5CH(+NH3)CH(OH)COy, present in taxol (a potent anti-cancer agent) and present in bestatin, 

Some of these naturally occurring amino adds are  

3 found only in the free state and not found in peptides found in the free state and also found in peptides and c found only in peptides and other derivatised forms. 

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