“…The structure ɣL[g+g+] is the most stable found along the surface conformation of N-For-L-Cys-NH2 .According to our knowledge, a conformational and electronic study of energetically favored conformations of N-For-L-Cys-NH2diamide at HF/3-21G and B3LYP/6-31G(d,p) (Zamora et al, 2002), shows that the most stable structure (global minimum) of this system adopts the structure ɣL [g+g+].in this work we found the same result with our technical computing AM1/GA-MNC. Results Table 4: Energies deviations from the global minimum and angles characterizing the minimum ɛL of N-For-L-Cys-NH2, AM1/GA-MNC Backbone [sidechain] ΔΔHf (kcal/mol) φ(°) ψ(°) χ1(°) χ2(°) ɛL [g-g+] 3. revealed that this techniques is useful for the generation of molecular structures constituting the conformational space of protein and could possibly be extended for the determination of molecular structures of other related molecules (Bora et al, 2019;Custódio et al, 2014;Daeyaert et al, 2005;Fu et al, 2018;Kaur and Kadam, 2018;Lucasius and Kateman, 1994;Luke, 1996;Song et al, 2018;Tian et al, 2018;Vitela and Castaños, 2012).…”