Need info on tyrosine/copper deficiency

I was told this color shift might be related to a tyrosine/copper deficiency instead of age. Anyone have some info on the subject?

Color about 3 years ago when he was imported.

http://img.photobucket.com/albums/v4...s/DSCF0459.jpg


Color last year.

http://img.photobucket.com/albums/v4...ptiles/015.jpg

Color now.
http://img.photobucket.com/albums/v440/SPJ01/002-7.jpg

I was under the impression that tyrosine deficiency is caused by an excess of the enzyme tyrosinase which breaks down tyrosine - which in turn results in the production of melanin (which woudl explain the darkening).

Tyrosinase is a copper-containing enzyme. So I would guess that an excess of tyrosinase would create a darker animal and a deficiency of tyrosine...........but since the enzyme contains copper, would the animal necessarily be copper deficient?

I would think that copper deficiency would result in anemia and other ailments but I'm probably wrong........

That's the best I can do.........dunno if it helps you..........

It kind of reminds me of those IMG snakes. They suddenly lose color, then gradually gain it back.

Also, isn't it pretty normal for BPs to darken with age?

If it is a copper deficiency, maybe feeding him rodents that have been raised on hog food would help. Hog food is very high in copper.

Just lots of guesses... but it might give you some ideas.