Point coloration: Difference between revisions - Wikipedia

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{{Short description|Coloration of animal coat/fur}}

[[Image:Neighbours Siamese.jpg|thumb|A cat with seal (black) point coloration.]]

'''Point coloration''' is [[Coat (animal)|animal coat]] coloration with a pale body and relatively darker extremities, i.e. the face, ears, feet, tail, and (in males) [[scrotum]]. It is most recognized as the coloration of [[Siamese (cat)|Siamese]] and related breeds of [[cat]], but can be found in [[dog]]s, [[rabbit]]s, [[fancy rat|rats]], [[sheep]], [[guinea pigs]] and [[horse]]s as well.

==In cats==

{{redirect|Lynx point|the Intel Chipset|Lynx Point}}

[[File:BlueLynxPointMittedMaleSiamese Cat with her Kitties.jpg|thumb|ANew-born sealkittens lynxsuckling milk from their seal point [[Ragdoll]]mother cat. Colourpoint kittens are born solid-white.]]

Point coloration in cats originated in the [[Siamese cat|Siamese]] and closely related Asian breeds, and is found in many Western-developed modern breeds. It is a form of partial [[albinism]] resulting from a [[mutation]] that affects [[tyrosinase]], an enzyme involved with [[melanin]] production. The mutated enzyme is [[thermolabile]]; it fails to work at normal body temperatures, but becomes active in cooler areas of the skin.<ref>{{cite journal

| author = D. L. Imes|date=April 2006 | title = Albinism in the domestic cat (''Felis catus'') is associated with a ''tyrosinase'' (''TYR'') mutation | journal = Animal Genetics | volume = 37 | issue = 2 | pages = 175–8 | doi = 10.1111/j.1365-2052.2005.01409.x

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File:Brown-mink.JPG|Black mink [[Tonkinese cat|Tonkinese]]

File:Geisha One Year Old (5640618397).jpg|Black sepia [[Burmese cat|Burmese]]

File:Starglitters Snowflake BEN n 24 33.JPG|Black [[Rosette (zoology)|rosetted]] [[Tabby cat|tabby]] point (lynx) [[Bengal cat|Snow Bengal]]

File:Tortie-point.jpg|Black [[Tortoiseshell cat|tortoiseshell]] point cat

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