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sheet in Biological Definition

Beta sheet

... The β sheet (also β-pleated sheet ) is a commonly occurring form of regular ... from the amino acid residues found in a β sheet structure may also be arranged such that many of ...

Secondary structure

... bonded turn (3, 4 or 5 turn) E = beta sheet in parallel and/or anti-parallel sheet conformation (extended strand). Min length 2 ... C (coil) or L (loop). The helices (G,H and I) and sheet conformations are all required to have a ...

Ebola

... 30-31). The natural reservoir for Ebola is still unknown today (Fact sheet No. 103). Another case was the death of a nightclub owner in Nzara ... and Prevention. 18 October 2002 . 3 September 2003 . Fact sheet Number 103 Ebola Hemorrhagic Fever . World Health Organization. December ...

Alpha helix

... together with beta sheets . The peptide backbone of an α helix has 3.6 amino acids per turn. See also : tertiary structure -- β sheet -- collagen helix References David Eisenberg, "The discovery of the α-helix and β-sheet, the principal structural features ...

Amino acid

... P Pro Proline hydrophobic 115.13 6.30 1.95 10.64 Can disrupt protein 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 ...

Bone

... region of primary ossification Epiphysis the end regions of the bone; regions of secondary 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 ...

Keratin

... is harder than alpha-keratin. Structurally alpha-keratin have alpha-helical coiled coil 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 ....

Prion

... a model of two conformations of PrP; on the left is the normal, alpha helical form, while on 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. ...

Protein

... Primary structure : the amino acid sequence Secondary structure : highly patterned 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 ...
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