Abstract:
:This report describes a lysozyme expressed at high levels in the stomach of the hoatzin, the only known foregut-fermenting bird. Evolutionary comparison places it among the calcium-binding lysozymes rather than among the conventional types. Conventional lysozymes were recruited as digestive enzymes twice in the evolution of mammalian foregut fermenters, and these independently recruited lysozymes share convergent structural changes attributed to selective pressures in the stomach. Biochemical convergence and parallel amino acid replacements are observed in the hoatzin stomach lysozyme even though it has a different genetic origin from the mammalian examples and has undergone more than 300 million years of independent evolution.
journal_name
Mol Biol Evoljournal_title
Molecular biology and evolutionauthors
Kornegay JR,Schilling JW,Wilson ACdoi
10.1093/oxfordjournals.molbev.a040173subject
Has Abstractpub_date
1994-11-01 00:00:00pages
921-8issue
6eissn
0737-4038issn
1537-1719journal_volume
11pub_type
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