A toner for developing an electrostatic charge image comprising a compound represented by a following formula (1): ##STR00001## wherein X represents H or --CO--R.sub.4; R.sub.4 represents an alkyl group having 1 to 4 carbon atoms and the alkyl group may have a substituent; R.sub.1 though R.sub.3 independently represent an alkyl group having 10 to 30 carbon atoms and the alkyl group may have a substituent; and R.sub.1 through R.sub.3 may be either the same or different.

 
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> Compositions and methods for detection and isolation of phosphorylated molecules

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