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γ‐Crystallins, abundant proteins of vertebrate lenses, were thought to be absent from birds. However, bird genomes contain well‐conserved genes for γS‐ and γN‐crystallins. Although expressed sequence tag analysis of chicken eye found no transcripts for these genes, RT‐PCR detected spliced transcripts for both genes in chicken lens, with lower levels in cornea and retina/retinal pigment epithelium...
γS‐crystallin (γS) is a highly conserved component of the eye lens. To gain insights into the functional role(s) of this protein, the mouse gene (Crygs) was deleted. Although mutations in γS can cause severe cataracts, loss of function of γS in knockout (KO) mice produced no obvious lens opacity, but was associated with focusing defects. Electron microscopy showed no major differences in lens cell...
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