MODIFIED AMINO ACIDS - HELP!!!

[Wolfgang Wegloehner]

Dear netters,

Does anybody in the net know where to get methylated amino acids? We are
especially looking for:

       N(epsilon)-trimethyl-L-Lysin   
 and   N(epsilon)-trimethyl-LAlanin

We would greatfully appreciate any suggestion concerning companies or labs.
Thanks in advance,

                         Juergen Schmidt,
               MPI fuer Molekulare Genetik, Berlin