in addition , the apparent interaction of the system with other basic amino acids , such as 1-dimethylpiperidine-4-amino-4-carboxylic acid , which has a nondissociable positive charge on its side chain , and l-arginine and l-homoarginine , whose cationic forms are highly predominant at neutral ph , suggests that the cationic forms of basic amino acids are transported by the wide-scope system .
C0003765
l-arginine
C0301714
basic amino acids