Abstract:
:A peptide containing 43 amino acid residues, rich in glutamic acid and lysine, was originally isolated from calf thymus and designated thymosin beta 4 [T.L.K. Low, S. -K. Hu, and A. L. Goldstein (1981) Proc. Nat. Acad. Sci. USA 78, 1162-1166]. However, thymosin beta 4 was also shown to be present in other tissues of rats and mice, with highest concentrations in spleen and peritoneal macrophages [E. Hannappel, G.-J. Xu, J. Morgan, J. Hempstead, and B.L. Horecker (1982), Proc. Nat. Acad. Sci. USA 79, 2172-2175]. We have now identified the same peptide in tissues of other mammalian species and other vertebrate classes, including birds and amphibia. Exceptions are the rabbit and bony fish, where thymosin beta 4 is replaced by different peptides, similar in size and in amino acid sequence. None of these peptides was detected in several invertebrates or in the protozoan, Tetrahymena pyriformis. In subcellular fractionation of rat spleen, thymosin beta 4 was recovered in the cytosol.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Erickson-Viitanen S,Ruggieri S,Natalini P,Horecker BLdoi
10.1016/0003-9861(83)90177-7subject
Has Abstractpub_date
1983-03-01 00:00:00pages
570-6issue
2eissn
0003-9861issn
1096-0384pii
0003-9861(83)90177-7journal_volume
221pub_type
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