| beta sheet |
The β sheet (also β-pleated sheet) is a commonly occurring form of regular secondary structure in proteins, first proposed by Linus Pauling and Robert Corey in 1951. It consists of two or more amino acid sequences within the same protein that are arranged adjacently and in parallel, but with alternating orientation such that hydrogen bonds can form between the two strands. The amino acid chain is almost fully extended throughout a β strand. ...
출처: en.wikipedia.org/wiki/Beta_sheet
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| beta-lactam |
A beta-lactam (β-lactam) is a lactam with a heteroatomic ring structure, consisting of three carbon atoms and one nitrogen atom (Fig. 1). The beta-lactam ring is part of several antibiotics, such as penicillin, which are therefore also called beta-lactam antibiotics. These antibiotics work by inhibiting the bacterial cell wall synthesis. This has a lethal effect on bacteria, especially on Gram-positive ones. ...
출처: en.wikipedia.org/wiki/Beta-lactam
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| beta. |
Beta (upper case Β, lower case β) is the second letter of the Greek alphabet. It seems to have come from the Phoenician word "beth" that means "house" or "tent". The shape of B represented that thing itself (tent), the usual house of the Semites. In the Ancient Greek language, it was pronounced , but in Modern Greek is pronounced . In the system of Greek numerals it has a value of 2. ...
출처: en.wikipedia.org/wiki/β
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| betaine |
Trimethylglycine (Betaine) functions very closely with choline, folic acid, vitamin B12, and a form of the amino acid methionine known as S-adenosylmethionine (SAMe). All of these compounds function as "methyl donors." They carry and donate methyl molecules to facilitate necessary chemical processes. The donation of methyl groups is very important to proper liver function, cellular replication, and detoxification reactions. ...
출처: en.wikipedia.org/wiki/Betaine
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| beta carotene |
A vitamin A precursor. Beta carotene belongs to the family of fat-soluble vitamins called carotenoids.
출처: www.stjude.org/glossary
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