I response to Sean Xie's question about a uniformly 13C and
15N labeled small peptide standard, you can buy the octapeptide
HTyrGlyGlyPheLeuArgArgIleOH with the GlyPheLeu residues uniformly 13C
and 15N labeled as a 1mM solution in DMSO-d6 from Cambridge Isotope
Laboratories. It is their catalog number CNLM-2408 and costs $950
MSRP as of 1998. CIL's phone number is (800) 322-1174.
Best regards,
Ken Fishbein
Facility
Manager, NMR Unit
NIH/NIA/GRC
Ph. (410) 558-8512
FAX (410) 558-8323
E-mail: fishbein@vms.grc.nia.nih.gov
Address: Ken Fishbein
NIH/NIA/GRC
5600 Nathan Shock Drive
Baltimore, MD 21224 USA