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The developmental changes in monoamine oxidase (MAO) activities towards 5-hydroxytryptamine (5-HT) and beta-phenylethylamine (PEA) in chick retina were investigated. The whole pattern of the developmental changes in MAO activity towards 5-HT was similar to that towards PEA, even though the activity towards 5-HT was much lower than that towards PEA during the period from the 12th day of incubation to the 14th day after hatching. The MAO activities on the 12th day of incubation were low and increased remarkably until the 18th day of incubation. Then they remained unchanged until the 7th day after hatching; therefore, they decreased. The activities measured on the 14th day after hatching are on the same level as those of an adult. The multiplicity of MAO in the retinae of a chick on the 12th day of incubation and of an adult was also studied with specific inhibitors. The result showed that the major part of MAO in chick retina is type B enzyme; that type A MAO in the retina of an adult is, however, relatively higher than that in the retina of the embryo on the 12th day of incubation. It was found that an appreciable amount of MAO activity towards 5-HT in chick retina is due to type B MAO.
O Suzuki, and
E Noguchi, and
K Yagi
January 1978,
Developmental neuroscience,
O Suzuki, and
E Noguchi, and
K Yagi
August 1975,
Journal of neurochemistry,
O Suzuki, and
E Noguchi, and
K Yagi
June 1973,
Journal of neurochemistry,
O Suzuki, and
E Noguchi, and
K Yagi
February 1977,
Brain research,
O Suzuki, and
E Noguchi, and
K Yagi
December 1986,
Neuroscience letters,
O Suzuki, and
E Noguchi, and
K Yagi
February 1979,
Experientia,
O Suzuki, and
E Noguchi, and
K Yagi
July 1975,
Psychopharmacology bulletin,
O Suzuki, and
E Noguchi, and
K Yagi
June 1991,
Experimental eye research,
O Suzuki, and
E Noguchi, and
K Yagi
March 1971,
Experientia,
O Suzuki, and
E Noguchi, and
K Yagi
June 1967,
Revue canadienne de biologie,
