14 



Spieazines 



Glutathione (Y-glutamyleysteylglycine) 



/CO— OH 



/ 



HO— OC CHzK ,C0 NH\ 



\ V CH— CH2— SH 



OH — CH2 — CHj/ ^]^jj CO^^ 



NH, 



Seterocyclic amino acids: 

 Proline 



Oxyproline 



Histidine 



Tryptophane 



NH— CH CO— OH 



i ^ ^ 



CH— C C— CH,— CH 



/ \ / \, 



// \/ \ 



HC C NH2 



\ / 



CH==CH 



