Abstract
1. The electrophoretically fast (F) and slow (S) fragments obtained by tryptic cleavage of bovine iron-saturated transferrin differed in carbohydrate content and peptide 'maps'. 2. A fragment capable of binding one Fe3+ ion per molecule was isolated after brief tryptic digestion of bovine apotransferrin and shown closely to resemble the S fragment obtained from the iron-saturated protein. 3. Fragments F and S are probably derived from the N- and C-terminal halves of the transferrin molecule respectively. 4. Bovine transferrin could donate iron to rabbit reticulocytes, but the monoferric fragments possessed little iron-donating ability.
Full text
PDFImages in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- AZARI P. R., FEENEY R. E. Resistance of metal complexes of conalbumin and transferrin to proteolysis and to thermal denaturation. J Biol Chem. 1958 May;232(1):293–302. [PubMed] [Google Scholar]
- Bezkorovainy A., Grohlich D. Comparative study of several proteins of the transferrin class. Comp Biochem Physiol B. 1974 Apr 15;47(4):787–797. doi: 10.1016/0305-0491(74)90024-8. [DOI] [PubMed] [Google Scholar]
- Brock J. H., Arzabe F. R. Cleavage of differic bovine transferrin into two monoferric fragments. FEBS Lett. 1976 Oct 15;69(1):63–66. doi: 10.1016/0014-5793(76)80654-0. [DOI] [PubMed] [Google Scholar]
- Brock J. H., Arzabe F., Lampreave F., Piñeiro A. The effect of trypsin on bovine transferrin and lactoferrin. Biochim Biophys Acta. 1976 Sep 28;446(1):214–225. doi: 10.1016/0005-2795(76)90112-4. [DOI] [PubMed] [Google Scholar]
- Gatt R., Berman E. R. A rapid procedure for the estimation of amino sugars on a micro scale. Anal Biochem. 1966 Apr;15(1):167–171. doi: 10.1016/0003-2697(66)90262-4. [DOI] [PubMed] [Google Scholar]
- Goodwin T. W., Morton R. A. The spectrophotometric determination of tyrosine and tryptophan in proteins. Biochem J. 1946;40(5-6):628–632. doi: 10.1042/bj0400628. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Graham I., Williams J. A comparsion of glycopeptides from the transferrins of several species. Biochem J. 1975 Feb;145(2):263–279. doi: 10.1042/bj1450263. [DOI] [PMC free article] [PubMed] [Google Scholar]
- MacGillivray R. T., Brew K. Transferrin: internal homology in the amino acid sequence. Science. 1975 Dec 26;190(4221):1306–1307. doi: 10.1126/science.1198114. [DOI] [PubMed] [Google Scholar]
- Mann K. G., Fish W. W., Cox A. C., Tanford C. Single-chain nature of human serum transferrin. Biochemistry. 1970 Mar 17;9(6):1348–1354. doi: 10.1021/bi00808a008. [DOI] [PubMed] [Google Scholar]
- Milstein C. P., Feinstein A. Comparative studies of two types of bovine immunoglobulin G heavy chains. Biochem J. 1968 Apr;107(4):559–564. doi: 10.1042/bj1070559. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Richardson N. E., Buttress N., Feinstein A., Stratil A., Spooner R. L. Structural studies on individual components of bovine transferrin. Biochem J. 1973 Sep;135(1):87–92. doi: 10.1042/bj1350087. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Williams J. Iron-binding fragments from the carboxyl-terminal region of hen ovotransferrin. Biochem J. 1975 Jul;149(1):237–244. doi: 10.1042/bj1490237. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Williams J. The formation of iron-binding fragments of hen ovotransferrin by limited proteolysis. Biochem J. 1974 Sep;141(3):745–752. doi: 10.1042/bj1410745. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Woods K. R., Wang K. T. Separation of dansyl-amino acids by polyamide layer chromatography. Biochim Biophys Acta. 1967 Feb 21;133(2):369–370. doi: 10.1016/0005-2795(67)90078-5. [DOI] [PubMed] [Google Scholar]
- Workman E. F., Jr, Graham G., Bates G. W. The effect of serum and experimental variables on the transferrin and reticulocyte interaction. Biochim Biophys Acta. 1975 Aug 13;399(2):254–264. doi: 10.1016/0304-4165(75)90256-1. [DOI] [PubMed] [Google Scholar]
- Zapolski E. J., Princiotto J. V. Failure of rabbit reticulocytes to incorporate conalbumin or lactoferrin iron. Biochim Biophys Acta. 1976 Jan 14;421(1):80–86. doi: 10.1016/0304-4165(76)90171-9. [DOI] [PubMed] [Google Scholar]