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Title: X-band electron paramagnetic resonance spectra of pig serum albumin-copper(II) and pig serum albumin-copper(II)-amino acid systems
Authors: Patel, R N
Pandeya, K B
Issue Date: Aug-2000
Publisher: NISCAIR-CSIR, India
Abstract: EPR spectra of the binary, PSA-copper(II) (1:1 and 2:1) and ternary systems, PSA-copper(II) -amino acid (1:1:1) have been studied. In binary system, two distinct EPR features have been observed, one of the features (towards the low field), showing broad and overlapping signals is attributed to non-specific bonding of copper(II) to albumin and other feature (towards higher field), showing sharp intense signals is attributed to specific bonding. The change from non-specific to specific bonding is favoured by increase in pH as well as by increase in protein concentration. Observed pH for transition from non-specific binding is 10.00 <pH < 11.30. A better resolution of nitrogen hyperfine couplings are obtained for both binary, PSA-Cu(II) (1:1 and 2:1) and ternary PSA-Cu(II)-amino ac id (1:1:1) systems. Seven and more than seven nitrogen superhyperfine lines are observed in g ┬áregion of binary and ternary systems respectively.
Page(s): 251-255
ISSN: 0975-0959 (Online); 0301-1208 (Print)
Appears in Collections: IJBB Vol.37(4) [August 2000]

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