Journal of Okayama Medical Association
Published by Okayama Medical Association

Full-text articles are available 3 years after publication.

無および低カタラーゼ血症マウスのカタラーゼ分子の性質に関する研究 第3編 マウス赤血球カタラーゼの分画及び等電点電気泳動による分析

佐藤 征紀 岡山大学医学部第二内科学教室
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Blood samples were taken from the orbital sinus (venous) of normal (C3H/C(sa)C(sa)), acatalasemic (C3H/C(sb)C(sb)) and hypocatalasemic (acatalasemic heterozygote, C3H/C(sa)C(sb)) mice. Packed red cells prepared from mice were washed three times with cold 0.9% NaCl solution to remove the buffy coat. One volume of red cells was hemolyzed with 1.5 volumes of distilled water. The various mouse hemolysates were fractionated into A, B and C fractions by DEAE cellulose column chromatography with a discontinous buffer system. Catalase activity in the eluate was determined by the perborate method, and the eluate was concentrated to 1.0PU/ml. Agarose isoelectric focusing was performed in a pH 3-to-10 Pharmalyte gradient gel at 81℃. The distribution of catalase in the erythrocyte fractions A,B and C from normal and mutant mice were examined.The activity ratio of the C fraction to the total fraction was greater in the descending order of C(sa)C(sa),C(sa)C(sb) and C(sb)C(sb) mice. Catalase of fraction A of C(sb)C(sb), C(sa)C(sb) and C(sa)C(sa) focused to band at pl 6.5-7.3, pl 5.7-6.5 and pl 5.4-5.9, respectively. Similarly, catalase of the fraction C of C(sb)C(sb), C(sa)C(sb) and C(sa)C(sa) focused to a band at pl 6.3-7.2, pl 5.9-6.5 and pl 5.0-6.0, respectively. Thus the isoelectric points of catalases in fractions A and C obtained from the blood of C(sb)C(sb) were higher than those of C(sa)C(sa). The isoelectric points of catalases in fractions A and C of C(sa)C(sb9 were between those of the C(sb)C(sb) and C(sa)C(sa). The results also indicate that the isoelectric point of catalase in fraction A was higher than that of fraction C in each group of mice.