Crystallins

Many taxon specific crystallins are encoded in a single gene which produce both an enzyme and the lens crystallin. ❋ Unknown (2006)

We believe that greater consideration should be given to the possibility that enzyme/crystallin recruitment is, in general, an adaptive process and that enzyme/crystallins may provide specific benefits to the lens. ❋ Unknown (2006)

So there are examples of taxon specific crystallins that are recruited from metabolic enzymes by the addition of a lens specific promoter. ❋ Unknown (2006)

Lens crystalins come in a number of flavors, but there are some taxon specific lens crystallins that are specific to certain groups of organisms. ❋ Unknown (2006)

Some taxon specific crystallins are the result of duplicated genes. ❋ Unknown (2006)

If ID has a better mechanism for the occurrence of the taxon specific crystallins and the implications of their distributions i.e. bird/reptile LDHB crystallin, then I would like to hear it. ❋ Unknown (2006)

As has been suggested for other cases 1, 2, the primary selective pressure for this gene recruitment may have been the modification of the optical properties of the lens in an ancestor of elephant shrews, “diluting” the specialized g-crystallins, to help make a softer accommodating lens. ❋ Unknown (2006)

Bloemendal H, de Jong W, Jaenicke R, Lubsen NH, Slingsby C, et al. (2004) Ageing and vision: structure, stability and function of lens crystallins. ❋ Line Kessel Et Al. (2010)

Interestingly, however, in this case the lens crystallins are known to be made from unrelated proteins, and so by the authors 'criteria there would be no' convergence 'here, even though in the classical definition (see below) this difference would be a crucial fact of convergence, almost diagnostic of the concept. ❋ Unknown (2009)