Calculate

N-terminus

• Acetyl (CH3CO-)
• Benzyl (C8H9-)
• Biotin (C10H15N2O2S-)
• Fmoc (C15H11O2-)
• Methyl (CH3-)
• Unmodified (H-)

C-terminus

• Alloc Dbz (-C11H12N3O3)
• Amide (-NH2)
• Benzyl ester (-C7H7O)
• Dbz (-C7H8N3O)
• Ethyl 3-mercaptopropionate (-C5H9O2S)
• Hydrazide (-NHNH2)
• MPAA (-C8H7O2S)
• Methyl ester (-OCH3)
• N-acylurea (-C8H6N3O2)
• SEA (-C4H10NS2)
• SeEA (-C4H10NSe2)
• Sulfamyl Rink (-C4H9N2O3S)
• Acid (-OH)

Optionally provide MS peaks for assignment