ISSN:
1432-1432
Keywords:
Ribonuclease
;
Amino acid sequence
;
Pronghorn
;
Giraffe
;
Bovids
;
Pecora
;
Ruminants
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Pancreatic ribonuclease from pronghorn (Antilocapra americana) was isolated and its amino acid sequence was determined from a tryptic digest of the performic acid-oxidized protein. Peptides were positioned by homology with other ribonucleases. Only peptides that differed in amino acid composition from the corresponding peptides of ox or goat ribonucleases were sequenced. In a most parsimonious tree of pancreatic ribonucleases, pronghorn and giraffe were placed together and these two were placed with the bovids, leaving the deer as a taxon separate from the other ruminants. The amino acid replacements that determine this tree topology are three rarely occurring replacements shared by pronghorn and giraffe. Notwithstanding their close phylogenetic relationship, both ribonucleases differ strongly in extent of glycosidation, net charge and antigenic properties.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01731371
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