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0answers
16 views

Reversible biological module in KEGG

Considering the kegg module M00570 The pathway looks like this: ...
2
votes
1answer
51 views

How to calculate the Jaccard index [closed]

I want to calculate the Jaccard index between two compounds. What is the algorithm? I have searched for it, it just gives the formula but how to apply it on compounds is not known to me. Can you help? ...
0
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1answer
47 views

What are these pathways called in Biology?

Considering the pentose phosphate pathway and the sulfate reduction pathway in bacteria; What are these types of reactions called in biology? Bio degradation reactions or bio transformation reactions ...
0
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0answers
10 views

What is isomeric threshold and isomeric count?

Found the terms isomeric point and isomeric threshold in the following paper: http://lib.gen.in/ocean/9064caa3202a71977f338ecb430280a7/10.1007%40s12539-012-0119-8.pdf It siad that the isomeric point ...
0
votes
1answer
27 views

Factors on which one compound transforming to another compound depend [closed]

Considering the Metabolic Pathway: http://www.genome.jp/kegg-bin/show_module?M00166 Consider the reaction R01523(the very first reaction). How is it possible to know that the compound ...
2
votes
1answer
23 views

Question related to L-arginine biosynthesis

With respect to the L-arginine Biosynthesis pathway, the very first reaction converts L-glutamate to N-acetyl L-glutamate. In the linked reaction scheme, why are only L-glutamate and N-acetyl ...
2
votes
1answer
37 views

Question regarding an Escherichia coli reaction

With respect to this link http://www.biocyc.org/ECOLI/NEW-IMAGE?type=REACTION&object=RXN-14479 Here the enzyme is mentioned and the two reacting compounds. Now , my question is 1. When these ...
4
votes
2answers
149 views

Do acetyl-CoA, acetyl-CoA carboxylase and acetyl-glutamate carry any charge?

Do the following compounds have any charge? If not, then why? If yes, is there any database that would give me this information if the compound is negatively or positively charged? The compounds are ...
5
votes
1answer
516 views

What produces the strong odor of decaying dead animals?

Are there specific chemicals responsible for producing the strong, putrid odor that is present after an animal deceases? Also, how long does this odor last?
1
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0answers
16 views

Can I use my extech pH60 meter to measure soil pH if so how? I included a link to the meter [closed]

Can I use my extech pH60 meter to measure soil pH if so how? I included a link to the meter. Extech pH 60
4
votes
1answer
25 views

What's the maximum pressure inside a bombardier beetle?

This question got me wondering about the pressure inside a bombardier beetle. Lots of articles mention pressure, but don't specify the amount of it: One study records the velocity of the spray to ...
1
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0answers
19 views

Why is carbonylation added as a fixed modification in mass spectrometry peptide analysis?

When using mass spectrometry analysis software we use carbonylation as a fixed modification. What is the significance of this modification and why doesn't it change?
8
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2answers
898 views

Just how dangerous is ethidium bromide?

A common precaution for preparing EtBr-agarose gels is to add EtBr only after the gel solution has cooled somewhat, because EtBr is a dangerous mutagen. Supposedly, adding it to a hot liquid allows ...
2
votes
1answer
124 views

Fatty Acid Synthesis

I have a problem in my reasoning on the fatty acid synthesis in the human body. In the synthesis process you have this homodimer. So the synthesis starts with the transfer of a acetyl group from ...
5
votes
2answers
2k views

What makes teeth feel sticky after drinking Coca-Cola?

I asked some of my friends and we all agree that teeth feel funny after drinking Coca-Cola. Other similar soft drinks also cause this effect, but this one most noticeably. It's like teeth become ...
0
votes
1answer
63 views

Why prefer $MgSO_4$ over $MgCl_2$ in recipies [closed]

Many molecular biology recipes use MgSO4 (and not MgCl2). Is there indeed a preference? If so, why?
3
votes
1answer
86 views

How do fish tolerate pH changes in water?

I want to know how aquatic animals behave as a natural indicator of the acidity in lakes and rivers. How do they tolerate these pH change?
2
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1answer
111 views

How Do Acid and Base Loving Plants Get Enough PO4?

Acidic and Basic soils experience phosphate sequestration through binding with either calcium, aluminum, or iron. How do plant that thrive in acidic and basic soils obtain the necessary phosphate? ...