The present invention encompasses the use of the compounds of formula as given below to detect certain specific protein structures which are present in nuclear localization sequences ##STR1## wherein A is, independently CH.sub.3 or CH.sub.2 CH.sub.3 and R is ##STR2## and salts thereof.
本发明涵盖使用以下公式的化合物来检测存在于核定位序列中的某些特定蛋白质结构:##
STR1## 其中A独立地表示CH.sub.3或CH.sub.2 CH.sub.3,R表示##
STR2##及其盐。