
09-01-2010, 03:57 PM
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Newbie
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Join Date: Feb 2008
Location: Colorado
Posts: 179
Classified Rating: 0% (0)
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Quote:
Originally Posted by Thehappypet
So we have agreed that the picta in the OP's post is an albino? If so it is the first albino picta I have ever seen! Very cool!
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There are 2 forms of albinism, tyrosinase-positive and tyrosinase-negative. Tyrosinase negative albinos make absolutely no melanin. Tyrosinase positive albinos make melanin-precursors which can be lavender to light brown in color and sometimes small amounts of melanin as well. In tyrosinase positive albinos the melanin and melanin precursors are often concentrated particularly in the eyes but may also appear on the body. In reptiles, tyrosinase positive animals are commonly referred to by breeders as "caramel albinos" rather than just "albinos".
My pictus line are definitely NOT tyrosinase negative albinos (the classic albino with pink eyes). They are almost certainly tyrosinase positive or caramel albinos. They hatch out with no melanin on the body and dark ruby red eyes. As they grow, the eyes seem to accrue even more melanin or melanin precursors and get even darker. As adults the eyes look black but shining a light into them one can see that they are really a deep dark ruby color (just as one sees for example in caramel albino ball pythons, "T+" radiated ratsnakes, and the like).
Hope this clarifies things a bit!
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