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Thread: Body odor differences between races1626 days old

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    Default Body odor differences between races

    http://www.nature.com/jid/journal/v1...d2009254a.html

    The characteristic human axillary odor is formed by bacterial action on odor precursors that originate from apocrine sweat glands. Caucasians and Africans possess a strong axillary odor ,whereas many Asians have only a faint acidic odor. In this study, we provide evidence that the gene ABCC11 (MRP8), which encodes an apical efflux pump, is crucial for the formation of the characteristic axillary odor and that a single-nucleotide polymorphism (SNP) 538G → A, which is prominent among Asian people, leads to a nearly complete loss of the typical odor components in axillary sweat. The secretion of amino-acid conjugates of human-specific odorants is abolished in homozygotic carriers of the SNP, and steroidal odorants and their putative precursors are significantly reduced. Moreover, we show that ABCC11 is expressed and localized in apocrine sweat glands. These data point to a key function of ABCC11 in the secretion of odorants and their precursors from apocrine sweat glands. SNP 538G → A, which also determines human earwax type, is present on an extended haplotype, which has reached >95% frequency in certain populations in recent human evolution. A strong positive selection in mate choice for low-odorant partners with a dysfunctional ABCC11 gene seems a plausible explanation for this striking frequency of a loss-of-function allele.
    And less than 10% of Asians use deodorant; http://business.timesonline.co.uk/to...cle4004449.ece

    I wonder if this characteristic (and the number of apocrine sweat glands) runs in a cline from northern to southern Europe.. it would make sense since Mediterraneans tend to have more body hair than Scandinavians and these glands occur in hairy parts of the body.

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    I think we are evolving away from strong odor as we no longer need it in modern urbanized societies.

    Asians seem to have the lead here as they do in many other areas.

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    Does alimentation also play a role on this?

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    Quote Originally Posted by Decimator View Post
    Does alimentation also play a role on this?
    It does but not enough to cause the differences, IMO.

    I have heard a lot about curry and its supposed coming out through the pores, but am not sure as to the accuracy.

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    Well... this might be a bit off topic but alimentation definately plays a role on farts.

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    Quote Originally Posted by Geto-Thracian View Post
    It does but not enough to cause the differences, IMO.

    I have heard a lot about curry and its supposed coming out through the pores, but am not sure as to the accuracy.
    Ive also heard about African America and chitlins and other fried foods coming through pores. Course this could be just a urban myth

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    Quote Originally Posted by Decimator View Post
    Does alimentation also play a role on this?
    I'm sure alimentation (and personal hygiene) play a big role.

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    Quote Originally Posted by ayepod View Post
    I wonder if this characteristic (and the number of apocrine sweat glands) runs in a cline from northern to southern Europe.. it would make sense since Mediterraneans tend to have more body hair than Scandinavians and these glands occur in hairy parts of the body.
    The T allele does become more infrequent as you move from north eastern to south western Europe. Russians have about 30% T while Iberians have 10%. However, most of those Europeans who carry the T allele are heterozygous for the SNP, that is, they carry one C and one T, which gives the same affect as carrying two C alleles. All in all, only 0.9% of Europeans carry two T alleles so it is rare for a European to express this low-odor type.

    Allele frequency for rs17822931 in ALFRED

    HapMap genotype frequency for rs17822931, CEU sample

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    I just looked it up. Seems I'm quite smelly compared to the two North Euro mixed American references.

    Polako CC
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    Like Polako, I'm also CC, and at the moment, I smell like shit under my arms. Could need some deodorant, and a shower

    https://www.23andme.com/you/explorer...ame=rs17822931
    https://www.decodeme.com/snp-look-up (paste rs17822931)
    Last edited by EliasAlucard; 2010-02-10 at 09:47. Reason: +deCODEme
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