Stabilization of thermally labile alkylcobalamins by a haptocorrin from chicken serum.

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Stabilization of thermally labile alkylcobalamins by a haptocorrin from chicken serum.

Binding of neopentylcobalamin and benzylcobalamin to the apoprotein of a haptocorrin from chicken serum has been demonstrated spectrophotometrically. The spectra of the protein-bound cobalamins strongly resemble those of base-on alkylcobalamins and show that when unbound these sterically hindered alkylcobalamins are only approximately 75% (benzyl) and 40% (neopentyl) base-on, at neutral pH and ...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 1991

ISSN: 0021-9258

DOI: 10.1016/s0021-9258(20)89561-1