One of the major structural groups of organic molecules, the aliphatic compounds include the alkanes, alkenes, and alkynes, and substances derived from them actually or in principle by replacing one or more hydrogen atoms by atoms of other elements or groups of atoms.
The major structural groups of purified extracts were detected using Fourier transform infrared spectroscopy (FT-IR).
PLP-dependent enzymes are divided into seven major structural groups (fold types), which presumably represent five evolutionary lineages (Grishin et al. 1995Schneider et al. 2000).
Correlations were evident between a number of the secondary metabolites, both within and between the major structural groups.
Quinones can be divided into two major structural groups: ubiquinones (or benzoquinones, UQ) and menaquinones (or naphthoquinones, MK).
The resonances were assigned based on the known chemical shifts of the major structural groups and metabolites using published data (Bezabeh et al, 2001; Sitter et al, 2002; Brisdelli et al, 2003) and commercially available pure metabolite reference spectra.
Inspection of the molecules in this group revealed 5 major structural classes, comprising 36 molecules, whose structures also indicated suitability for chemical modifications and in vivo use.
Considering these parameters, the only major structural difference was the experimental group being offered the additional opportunity to Web-publish their discoveries to a target audience.
The major structural difference between subgroup E and group 2 is the presence of the B-box1, which indicates that group 2 proteins could have derived from a subgroup E member upon loss of B-box1.
In the wild type protein, the highly conserved N-terminal 20 residues can be grouped into two major structural classes.
