Right-handed and left-handed helices of poly(dA-dC).(dG-dT)
نویسندگان
چکیده
منابع مشابه
A designed protein with packing between left-handed and right-handed helices.
A common motif in protein structures is the assembly of alpha-helices. Natural alpha-helical assemblies, such as helical bundles and coiled coils, consist of multiple right-handed alpha-helices. Here we design a protein complex containing both left-handed and right-handed helices, with peptides of D- and L-amino acids, respectively. The two peptides, D-Acid and L-Base, feature hydrophobic hepta...
متن کاملCharacterization of right-handed and left-handed shapes
Many natural shapes are chiral (or handed). Our hands, for example, have a righthand version and a left-hand version, the two types being mirror images of each other. Molecules are also classi ed according to their chirality, which determines their chemical characteristics. Glucose, for example, is sweet only in one chirality, while it is tasteless in the other. The notion of chirality for two ...
متن کاملConversion of Left-Handed Coordinates to Right-Handed Coordinates
2 Left-Handed Coordinate Systems 3 2.1 Heading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 Bank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 Order of Rotations . . . ...
متن کاملEuclidean general relativity from “ left - handed area = right - handed area ”
A classical continuum theory corresponding to Barrett and Crane’s model of Euclidean quantum gravity is presented. The fields in this classical theory are those of SO(4) BF theory, a simple topological theory of an so(4) valued 2-form field, B μν , and an so(4) connection. The left handed (self-dual) and right handed (anti-self-dual) components of B define a left handed and a, generally distinc...
متن کاملLeft-handed and ambidextrous helices in the gas phase.
We have used ion mobility mass spectrometry to study the effect of d-residues on helix formation in unsolvated alanine-based peptides. The right-handed helix of AC-A15K + H+ is significantly disrupted when five or more of the natural L-residues are randomly replaced with D-residues. On the other hand, when a block of L-residues is replaced with D-residues, an unusual ambidextrous structure with...
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ژورنال
عنوان ژورنال: Nucleic Acids Research
سال: 1985
ISSN: 0305-1048,1362-4962
DOI: 10.1093/nar/13.12.4469