Effects of $gamma$ rays on poly-L-glutamic acid in aqueous solutions

Journal Article · Mon Oct 01 04:00:00 EDT 1973 · Biophysik, v. 10, no. 3, pp. 221-228

OSTI ID:4397409

Kunikane, M; Sugai, S

Salt-free and 0.2 M NaCl oxygenated aqueous solutions of polyL-glutamic acid were irradiated with /sup 60/Co gamma radiation at various pH's to examine whether or not the changes caused by the exposure to ionizing radiation depend on pH, that is, the conformations of polypeptide. The G-values (the number of main- chain scissions per l00 eV of energy absorbed) in both salt-free and 0.2 M NaCl solutions of poly-L-glutamic acid were found to change sharply with pH and to have a maximum value at the pH of a mid-point of helix-coil transition. The change of G-values with pH was discussed in terms of the conformational change of poly-L-glutamic acid. (GE)

• Research Organization: Hokkaido Univ., Sapporo
• NSA Number: NSA-29-009937
• OSTI ID: 4397409
• Journal Information: Biophysik, v. 10, no. 3, pp. 221-228, Journal Name: Biophysik, v. 10, no. 3, pp. 221-228; ISSN BPYKA
• Country of Publication: Germany
• Language: English

Related Subjects

*GLUTAMIC ACID-- CHEMICAL RADIATION EFFECTS
AQUEOUS SOLUTIONS
G VALUE
GAMMA RADIATION
HELICAL CONFIGURATION
N40300* --Chemistry--Radiation Chemistry
PH VALUE
POLYPEPTIDES
RADIATION CHEMISTRY