Sorry for the offtopic line of posts, but this may actually be entertaining to some.

That's exactly why I brought it up :)

To a percentage of the population, Durian smells unbelievably foul - and then again to others it smells great! I suspect that this is driven by smell receptor polymorphism or something like that. Same with lutefisk - to many of us it smells like rotten fish (which it is, kind of) - but I have seen people eat it with all visible signs of enjoyment.

Then there's phenylthiocarbamide, propylthiouracil and other compouds of the thiourea class that taste bitter to 2/3 of people and to 1/3 they do not have a taste at all, which in turn seems to govern our love for broccoli and other brassicate vegetables 

Bell KI, Tepper BJ. Short-term vegetable intake by young children classified by 6-n-propylthoiuracil bitter-taste phenotype. Am J Clin Nutr. 2006 Jul;84(1):245-51.

They (maybe still do?) used to distribute small samples of the stuff to genetics lecture audiences because this phenomenon is governed by inheritable polymorphism of TAS2R38 receptor. Arthur Fox from DuPont discovered this in the 1930-ies which gives me the opportunity to gleefuly quote an almost 100-year old paper:

Fox, A. The relationship between chemical constitution and taste. PNAS USA, 1932;18:115–20.

Also cool read:  Genetics of Taste and Smell
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3342754/

Artem

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On Tue, Jan 26, 2016 at 5:23 AM, Harry Powell <[log in to unmask]> wrote:
Hi

Durian is a real pleasure - I can get them locally and they are a huge treat! 

On 26 Jan 2016, at 02:21, Artem Evdokimov wrote:

Not sure :(

Mercaptanes are pretty much all smelly (less so as they get large and less volatile). So are arsines and other fun reactive chemicals although I think mercaptanes are so smelly to us because they are common byproducts of putrefaction and this is the case of evolution telling proto-man that eating this particular smelly animal carcass would be a jolly bad idea. Ditto the aptly named putrescine and cadaverine (and many of the long-chain fishy amines in general). Those who evolved to recognize the smell as 'bad' lived, the others followed the cold merciless miracle of natural selection. Makes one wonder about lutefisk, durian fruit, and many of the nastier cheeses...

The headaches are real, though. Mine get bad enough to qualify as migraines.

Artem





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On Mon, Jan 25, 2016 at 9:15 PM, Keller, Jacob <[log in to unmask]> wrote:

>BME gives Artem (and several people I know) wicked headaches, even at minimal exposure.

 

I have always wondered whether the headache or perhaps also the stinky smell itself comes from some disulfide-bonded protein in the olfactory apparatus getting reduced. Also with glutaraldehyde—are the olfactory receptors getting cross-linked?

 

JPK

 



Harry
--
Dr Harry Powell, MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH
Chairman of International Union of Crystallography Commission on Crystallographic Computing
Chairman of European Crystallographic Association SIG9 (Crystallographic Computing)