We compare a recent selection theorem given by Chistyakov using the notion of modulus of variation, with a selection theorem of Schrader based on bounded oscillation and with a selection theorem of Di Piazza-Maniscalco based on bounded A , Λ-oscillation.
A surprísingly high level of the CPI membrane-bound apoprotein was found through ELISA test in barley coleoptiles, cotnpared with etiolated leaves. Non-synchronous changes of the chlorophyll (Chl) a and CPI apoprotein contents were found in greening etiolated seedlings after brief preinradiation, in green leaves after continuous darkness and the second weak irradiation, and in old leaves after a period of darkness. The complexity of these fmdings gives a possibility of the CPI apoprotein formation without direct cotmection to Chl a biosynthesis. The CPI apoprotein accumulation in young etiolated leaves was stimulated by S-aminolevulinic acid.