Details

Autor(en) / Beteiligte

• Markin, Alexey V
• Markhasin, Evgeny
• Sologubov, Semen S
• Smirnova, Natalia N
• Griffin, Robert G

Titel

Standard Thermodynamic Functions of Tripeptides N‑Formyl‑l‑methionyl‑l‑leucyl‑l‑phenylalaninol and N‑Formyl‑l‑methionyl‑l‑leucyl‑l‑phenylalanine Methyl Ester

Ist Teil von

• Journal of chemical and engineering data, 2014-04, Vol.59 (4), p.1240-1246

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The heat capacities of tripeptides N-formyl-l-methionyl-l-leucyl-l-phenylalaninol (N-f-MLF-OH) and N-formyl-l-methionyl-l-leucyl-l-phenylalanine methyl ester (N-f-MLF-OMe) were measured by precision adiabatic vacuum calorimetry over the temperature range from T = (6 to 350) K. The tripeptides were stable over this temperature range, and no phase change, transformation, association, or thermal decomposition was observed. The standard thermodynamic functions: molar heat capacity C p,m, enthalpy H(T) – H(0), entropy S(T), and Gibbs energy G(T) – H(0) of peptides were calculated over the range from T = (0 to 350) K. The low-temperature (T ≤ 50 K) heat capacities dependencies were analyzed using the Debye’s and the multifractal theories. The standard entropies of formation of peptides at T = 298.15 K were calculated.