Good morning, and welcome to Free Expression on the Weekend. This week we are joined by columnists Louise Perry and James B. Meigs to talk about the remarkable—and sudden—shift in attitudes toward the ...

Gene expression profiling is the determination of the pattern of genes expressed, at the level of transcription, under specific circumstances or in a specific cell to give a global picture of cellular ...

Expression systems are genetic constructs (a gene encoded by DNA) that are designed to produce a protein, or an RNA (ribonucleic acid), either inside or outside a cell. Expression systems are used in ...