The island is irregular in shape and has a rugged mountain backbone, which reaches its maximum height at Mount Lobi (4,426 feet [1,349 metres]) in the centre.
Turns are irregular structures with a wider variety of possible backbone conformations [2] and for each group of conformations a different scaffold is needed.
Until last week, the irregular Shiite forces, known as the Popular Mobilization, had formed the backbone of the Iraqi government's effort to retake Tikrit from Islamic State extremists who have controlled the hometown of the late Iraqi President Saddam Hussein since staging a lightning sweep across Iraq last year.
Beta-glucans are natural polysaccharides consisting of a backbone of (1,3 -beta-glycosidic linked d-glucose subunits, with irregular beta-(1,3 -beta-glycosidicins of various length.
Hence, various bends of backbones are needed for the creation of regular or irregular arrangements.
However, these old organic structures usually form the backbone and core of the later planned urban texture, and the irregular patterns in their form and morphology may often be partially or fully observed in the current settlements (Fig. 1).
The end of loop L5 and the beginning of L1 are rather irregular; both areas differ between Pla and Epo, and a side chain-backbone hydrogen bond would stabilize the loops relative to each other.
It was demonstrated that the intermolecular steric hindrance and irregular arrangement of azobenzene chromophores were not favorable for the topo-polymerization and chirality formation of polydiacetylenes backbone.
Folded protein chains consist of segments with regular backbone structure (primarily α helix or β strand conformations) connected either by turns or by segments with irregular structure (loops).
As seen in the crystal structure of C. elegans ceUNC-45 [ 21 ], UCS proteins have a rigid protein backbone, which is established by the central and the neck domain that fold into a series of irregular ARM repeats.
