one particularly interesting difference is the accumulation of c ( 6 ) guanidino amino acids ( arginine and gamma-hydroxyarginine ) by vicia and the accumulation of c ( 7 ) guanidino amino acids ( homoarginine , gamma-hydroxyhomoarginine and the related amino acid lathyrine ) by lathyrus .
C0003765
arginine
C0019877
homoarginine