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Describe the structure of a beta barrel. Describe the structure of a beta saddle.

Describe the structure of a beta barrel.

Describe the structure of a beta saddle.

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Answer #1

Beta barrel:

A beta barrel is a large beta-sheet that twists and coils to form a closed structure in which the first strand is hydrogen bonded to the last. Beta-strands in beta-barrels are typically arranged in an antiparallel fashion.

There are three main types:

1. Up-and-down barrels

2. Greek key barrels

3. Jelly roll (Swiss roll) barrels

Beta Saddle are mostly parallel with one antiparallel strand and the distinct twist is found with common axis.

A beta saddle is also a type of beta sheet that twists but it is not a closed one.Beta saddle is an open structure of beta sheets containing twists.Beta saddle are beta sheets twisted in a parallel fashion.

A Beta Saddle is mostly parallel with one antiparallel strand that has distinct twist with common axis.

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