Screening for Positive Clones Generated by Differential Display

Differential display is a powerful method to identify genes that are differentially expressed in different tissues or in the same tissue exposed to different treatments (1 ,2 ). The method can be performed with relatively little biological material, and the resulting partial cDNAs can be cloned, sequenced, and used for subsequent expression studies. cDNA fragments derived from downregulated as well as upregulated transcripts can be detected simultaneously, and cDNAs corresponding to messages of high and low abundance are detected with similar probabilities.