Oculocutaneous albinism is conventionally classified as to whether it is tyrosinase-negative or tyrosinase-positive. In the tyrosinase-negative class, there is absence of the enzyme tyrosinase. In the tyrosinase-positive class, tyrosinase is present but it cannot enter pigment cells to do its job and make melanin.

tyrosinase

(Science: enzyme) A copper containing protein (a monoxygenase) that catalyses the oxidation of tyrosine and sets in train spontaneous reactions that yield melanin, the black pigment of skin, hair and eyes. The first intermediate is 3, 4 dihydroxyphenylalanine (dOPA). lack of tyrosinase activity is responsible for albinism.

Et concrètement.. Quelqu'un qui vendrait un animal T+ albinos.. cet animal.. représenterait-il un avantage important par rapport à un animal qui ne serait pas T+? De sorte que le vendeur aurait avantage à le marquer que cet animal est T+?

Merci J-P et Phil, j'vais chercher un peu d'mon coté!

d'Accord mia smoi je en comprend pas quand vous dites admetton gecko leopard De phase
cela veut dire quoi ?

The T+ albino,commonly called the caramel albino or lavender albino is our most exciting project. The "T" in T+ refers to the presence of the enzyme TYROSINASE. Tyrosinase is necessary for the production of melanin. The process of creating melanin is fairly simple. The amino acid TYROSINE is converted into DOPA and then into DOPAQUINONE in the presence of TYROSINASE, which is synthesized by the MELANOPHORES. This is a very simplified version of the basis for the terms TYROSINASE POSITIVE (T+) and TYROSINASE NEGATIVE (T-) albinos. In T- albinos, Tyrosinase is NOT produced and the melanophores are unable to synthesize any melanin. This results in an animal which possesses absolutely NO black or brown pigment. In the TYROSINASE POSITIVE (T+) albino, Tyrosinase IS produced but is blocked from gaining access to the melanophore. Simply put, all the ingredients are there, they are just unable to mix. However, a certain amount of mixing does occur in some forms of T+ albinos and they develop varying amounts of melanin as they mature to the point where some individuals, as adults, would be hard to distinguish from normal. This is commonly referred to as the "LEAKY GENE" form of T+. Less common is the "NULL GENE" form of T+ that doesn't experience any "leakage" and NEVER develops any melanin. Our T+'s are of the much rarer, "NULL GENE" type and melanin does not develop as they mature.

Je me sens un peux concerner
Premièrement , tu sais qu'une phase cela veux dire couleur.

Quand ont dit exemple " gecko de phase ", cela veux dire que j'ai plusieurs belle phase autre que régulier donc des beaux spécimens un peux moin répendu