Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A secondary structure that occurs in many proteins and consists of two or more parallel adjacent polypeptide chains arranged in such a way that hydrogen bonds can form between the chains.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry A secondary structure in proteins consisting of multiple strands connected laterally

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[From beta-form, the form taken by a protein molecule after it has been stretched.]

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