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A density functional study of the glycine molecule using different basis sets in the local spin density approximation with gradient corrections is reported. The results compare well with previous calculations which take into account correlation by different post Hartree-Fock procedures and with microwave and electron diffraction studies. Energetic results show that the OH-N containing conformation is more stable than the conformation of C 1 symmetry containing NH 2 -OH bifurcated H-bonds. In the case of this family of conformations the C s symmetry conformation is a saddle point. Furthermore the results show that inclusion of a fraction of the exact Hartree-Fock exchange improves both the molecular geometries and energetics.