Cast Array
Cast Array
Microarrays, or "gene chips," have become valuable tools for studying changes in gene expression; detecting genetic mutations and polymorphisms; analyzing drug resistance and disease susceptibility; and sequencing unknown DNA. The microarray, which consists of cloned genes, PCR products, or synthetic oligonucleotides immobilized on a microscope slide, is analyzed by hybridization with target DNA or RNA that is labeled with radioisotopes or fluorescent dyes.1 For example, total mRNA isolated from