sheet

Secondary structure

... hydrogen bonded turn (3, 4 or 5 turn) E = beta sheet in parallel and/or anti-parallel sheet conformation (extended strand). Min length 2 residues. B = residue in isolated beta-bridge (single...

Protein

...erned sub-structures— alpha helix and beta sheet —or segments of chain that assume no stable shape . Secondary structures are locally defined, meaning that there can be many different secondary motifs present in one single protein molecule. Tertiary structure : the overall shape of a si...

Prion

... the right is the prion form. Note the increased sheet content (green arrows) in the prion version of the molecule. These sheets create an electric dipole and can lead to amyloid aggregation. Classification Mammalian prions, agents of spongiform encephalopathies Disease name Natural ...

Keratin

...l structure while beta-keratin have twisted beta sheet structure. In humans, the keratin family of proteins is divided into the soft epithelial keratins or cytokeratins and the hard hair keratins . These can be divided into type I (acidic) and type II (basic to neutral) subfamilies. Keratin is als...

Bone

...ndary ossification Epiphyseal plate the thin sheet of bone marking the fusion of epiphyses to the diaphysis (adults only) Head the proximal articular end of the bone Neck the region of bone between the Head and the Shaft See also Fracture Bone healing List of bones ...

Beta sheet

The β sheet (also β-pleated sheet ) is a commonly occurring form of regular secondary structure in proteins , first proposed by Li...

Amino acid

...folding structures like α helix or β sheet . Q Gln Glutamine hydrophilic 146.15 5.65 2.17 9.13 R Arg Arginine basic 174.20 10.76 1.82 8.99 12.48 S Ser Serine hydrophilic 105.09 5.68 2.19 9.21 T Thr Threonine h...

Alpha helix

...urn. See also : tertiary structure -- β sheet -- collagen helix References David Eisenberg, "The discovery of the α-helix and β-sheet, the principal structural features of proteins". Proceedings of the National Academy of Sciences USA. (2003). 100 :11207-11210. http:...