For several years I have seen several breeders, hobbyists, and enthusiasts use the terms tyrosinase-positive & tyrosinase-negative to describe the albino strains present in leopard geckos. My question is, what do you have to back up your claim? I am looking for scientific evidence showing that they either did or did not find tyrosinase being produced in the albino strain in question. I believe in leopard geckos this may be trickier then many people suspect. I for one do not think the terms T- or T+ can be applied at this time until further research has been conducted to prove the fact that they are in fact T- or T+. Some people say that the strains with the extreme red eyes are T-, but after researching this question repeatedly, I keep coming to the fact that T- eye coloration can range from grayish-blue to red, and the same for T+ albinos. All the information was gather via medical journals and related publications on the subject, not via an internet site. For months I have been searching for someone to test skin samples of the various albinos strains to find out for sure if they are either T- or T+, but no luck so far. Does anyone else know something I do not know and that is why I repeatedly see several of the albino strains (in leopard geckos) being referred to as T- and t+?
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Justyn Miller

Intense Herpetoculture

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