Table 1. Peptide stability energies of the peptides in kcal/mol.

Peptide	∆Hstability (kcal/mol)	∆∆H rel (kcal/mol)
L-ArgPEP	−731.4 ± 14.9	+11.2
D-ArgPEP	−742.6 ± 16.6	0.0
(P)L-ArgPEP	−598.0 ± 16.9	+14.5
(P)D-ArgPEP	−612.5 ± 16.1	0.0

Note: The (P) designates “Protected”. ∆∆H _rel = E(DARG) - E(Pep). Overall, the non-protected peptides are predicted to be more stable in water than the protected peptides.