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- rod like
- CO & NH of the mainchain are hydrogen bonded together, allowing the mainchain to be buried
- n+4 H bonding scheme
- all alpha carbons are H bonded and in line with each other
- R groups are on the outside & backbone on the inside
- always right handed (clockwise)
- can be a single chain (usually less than 45 Angstroms)
- Residues that are 1 & 2 residues apart are on opposite sides, while residues that are 3 & 4 residues apart are on the same side; this allows small steric hindrance
- 1.5 Angstroms rise (from one alpha carbon to the second)
- 100 degree rotation
- 3.6 residues per turn
- Ramachandran diagrams (1) Right handed: can only occur between -60, -60; little hindrance (2) Left handed: +60, +60; large hindrance
- sheet like
- Beta sheets are formed by linking 2 or more Beta strands by H bonds
- side chain of adjacent residues point in opposite directions
- only trans peptide bonds give R groups on opposite sides
- cannot exist as a single Beta strand; must be 2 or more
- in proteins, 4-5 strands make up a beta sheet; it is possible to be made of more than 10
- 3.5 Angstroms rise between residues
- 7 Angstroms between R groups
- Arrow in pictures always points to the CO group
- can be antiparallel, parallel, or mixed
- anti: 1:1; alpha carbons are completely lined up across from each other; CO & NH of adjacent strands are H bonded together; chains are in opposite directions
- parallel: strands are in the same direction; NH group of the first chain is bonded to the CO of the 2nd chain through H bond, then move two residues to the right and the CO of the first chain is H bonded to the NH of the 2nd chain.
- Ramachandran diagrams: exists between -60 to -120, 100-190
A beta strand is a single chain of amino acids with a specific conformation, while a beta sheet is formed when two or more beta strands align and hydrogen bond with each other. Beta strands are the building blocks of beta sheets, which are a common secondary structure in proteins.
Alpha helix and beta pleated sheets both are held together with H bonds between carbonyl O and amino N. Alpha helix specifies with residues bind. Beta pleated sheets can happen between any 2 residues.
Stabilized by hydrogen bonds, hydrogen bonding between amides groups
Polypeptide secondary structures.
Beta sheets consist of beta strandsconnected laterally by at least two or three backbone hydrogen bonds, forming a generally twisted, pleated sheet.
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What is a beta pleated sheet in DNA?
A regular element of secondary structure in proteins, in which two or more extended strands of the polypeptide chain lie side by side (running either parallel or antiparallel), held together by a regular array of hydrogen bonds between backbone NH and C=O groups, to form a ridged planar surface. The amino-acid side chains alternately face to opposite sides of the sheet.
What level of molecular organization is a beta-folded sheet?
A beta-folded sheet is a secondary structure of a protein, which is the next level of molecular organization above the primary structure. It is formed by hydrogen bonding between adjacent segments of a polypeptide chain, creating a flat and elongated sheet-like structure.
What is the difference between a beta plus particle and a beta minus particle?
The difference between a beta plus and beta minus particle is the electrical charge. The charges are equal, but opposite. The beta minus particle is an electron with a negative charge, while the beta plus particle is an anti-electron or positron with a positive charge.
What do you call the 2 types of secondary protein structure which are evident in a polypeptide cha in?
The two types of secondary protein structure are alpha helix and beta sheet. In an alpha helix, the polypeptide chain is tightly coiled in a helical shape, while in a beta sheet, the polypeptide chain is folded into a sheet-like structure with hydrogen bonds between neighboring strands.
How many beta sheet hemoglobin have?
Hemoglobin does not contain beta sheets. It is a globular protein composed of four subunits - two alpha and two beta subunits in adults (hemoglobin A). Each subunit consists of alpha-helices, not beta sheets.
What is a beta pleated sheet in DNA?
A regular element of secondary structure in proteins, in which two or more extended strands of the polypeptide chain lie side by side (running either parallel or antiparallel), held together by a regular array of hydrogen bonds between backbone NH and C=O groups, to form a ridged planar surface. The amino-acid side chains alternately face to opposite sides of the sheet.
Difference between beta and standard deviation?
* * *
What is difference between alpha helix and beta sheet?
Alpha helix is a secondary structure of proteins where the polypeptide chain is coiled in a right-handed spiral, stabilized by hydrogen bonds between the amino and carboxyl groups. Beta sheet is another secondary structure where the polypeptide chain forms a zigzag pattern, with hydrogen bonds between adjacent chains running parallel or antiparallel to each other.
What is the difference between Gamma and Beta burns?
"beta burns" are shallow surface burns
Can paper shield beta particles?
Beta particles are not stopped by a paper sheet.
What level of molecular organization is a beta-folded sheet?
A beta-folded sheet is a secondary structure of a protein, which is the next level of molecular organization above the primary structure. It is formed by hydrogen bonding between adjacent segments of a polypeptide chain, creating a flat and elongated sheet-like structure.
What is the difference between a beta plus particle and a beta minus particle?
The difference between a beta plus and beta minus particle is the electrical charge. The charges are equal, but opposite. The beta minus particle is an electron with a negative charge, while the beta plus particle is an anti-electron or positron with a positive charge.
What is the difference between halo reach beta and the actual game on xbox live?
The Beta was used to test the game for Bungie.
What is difference between beta and alpha test Brief?
A brief explanation of the difference between beta and alpha test is that alpha test is usually in-house and is part of basic development. Beta test is right before product release and typically includes customer input.
How can you prevent beta particles?
Thin sheet or plastic may prevent beta particles.
What the best conclusion concerning the difference between the S phases for beta and gamma is that?
gamma contains more DNA than Beta
What is a beta barrel?
A beta barrel is a protein structure where beta strands form a cylindrical shape that typically surrounds a central pore. This structure is commonly found in transmembrane proteins that span lipid bilayers. Beta barrels play essential roles in various cellular processes, including transport of molecules across membranes and as receptors for signaling molecules.
