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The crystal structure of N-(t-butoxycarbonyl)-L-methionyl-glycine ethyl ester has been determined. The crystal data are: P2_1, α=14.504(6), b=5.015(2), c=12.762(6), β=93.63(3)°, Z=2. The final R is 0.066 for 1495 reflections. The torsion angles of methionyl side chain are X~1=-177.7°. X~2=178.6°, X~3=-71.7°. The plan of the side chain is approximately vertical to the plan of the peptide. The peptide main chains are packed in a parallel β-sheet structure, the main chain torsion angles(φ,ψ) of the methionyl residue being (-118.9°,115.4°). This compound, BOC-L-Met-Gly-OEt, is very similar to certain derivatives used in the peptide transport studies which were carried out by Naider et al.
The crystal structure of N- (t-butoxycarbonyl) -L-methionyl-glycine ethyl ester has been determined. The crystal data are: P2_1, α = 14.504 (6), b = 5.015 (2), c = 12.762 (6) , β = 93.63 (3) °, Z = 2. The final R is 0.066 for 1495 reflections. The torsion angles of the methionyl side chain are X ~ 1 = -177.7 °. X ~ 2 = 178.6 ° X ~ 3 = 71.7 °. The plan of the side chain is approximately vertical to the plan of the peptide. The peptide main chains are packed in a parallel β-sheet structure, the main chain torsion angles (φ, ψ) of the methionyl residue being (- 118.9 °, 115.4 °). This compound, BOC-L-Met-Gly-OEt, is very similar to certain derivatives used in the peptide transport studies which were carried out by Naider et al.