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Beta-lactamase

Beta-lactamase

(Science: enzyme) An enzyme produced by some bacteria, which causes the breakdown of the active form of some penicillin antibiotics, rendering them ineffective. It causes the hydrolysis of a beta-lactam (as penicillin to penicilloic acid); found in most strains of staphylococcus bacteria that are naturally resistant to penicillin.

Synonym: cephalosporinase, penicillinase.


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Determine whether gene lac I and lac O is functioning?

My sample is treated in 3 ways: No inducer, with lactose , with IPTG. ONPG is used in all sample to determine the beta galactosidase. I know that both lactose and IPTG can associate with lac repressor and cause expression. If the result of these three treatment only with IPTG appears ...

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by eos
Fri May 09, 2014 11:57 am
 
Forum: General Discussion
Topic: Determine whether gene lac I and lac O is functioning?
Replies: 0
Views: 502

Hyperadrenergic POTS

... a decrease in sympathetic tone both centrally and peripherally. Central sympatholytics such as methyldopa or clonidine can be used. Peripheral beta-adrenergic blockade may be better tolerated by these patients than by those with neuropathic POTS. A specific genetic abnormality has been identified ...

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by rmorrison
Wed Mar 19, 2014 5:38 pm
 
Forum: Human Biology
Topic: Hyperadrenergic POTS
Replies: 0
Views: 2366

Re: Beta oxidation

what is beta oxidation?

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by blackshirts
Sat Mar 15, 2014 7:18 pm
 
Forum: Molecular Biology
Topic: Beta oxidation
Replies: 2
Views: 1998

Re:

I already gave you the answer in the other thread. It's beta-hemolytic streptococcus (provided that your previous post correctly identified hemolysis). Look at the links bellow: http://loudoun.nvcc.edu/vetonline/vet13 ... cocci2.gif http://img.docstoccdn.com/thumb/orig/9217067.png ...

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by microbiologyhelp
Fri Dec 20, 2013 10:07 pm
 
Forum: Microbiology
Topic: ID OF UNKNOWN?!?!
Replies: 5
Views: 3327

Re: Re:

I already gave you the answer in the other thread. It's beta-hemolytic streptococcus (provided that your previous post correctly identified hemolysis). Look at the links bellow: http://loudoun.nvcc.edu/vetonline/vet13 ... cocci2.gif http://img.docstoccdn.com/thumb/orig/9217067.png ...

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by microbiologyhelp
Thu Dec 12, 2013 6:12 pm
 
Forum: Microbiology
Topic: ID OF UNKNOWN?!?!
Replies: 5
Views: 3327
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