Early molecular technologies, including the ones described in this chapter, were applied to understanding the structure, function and regulation of specific genes. Some of the more recent technologies...Early molecular technologies, including the ones described in this chapter, were applied to understanding the structure, function and regulation of specific genes. Some of the more recent technologies (e.g., microarrays) are well adapted to holistic approaches to understanding cell function. Terms we have already seen (genome, epigenome, transcriptome) were coined in an effort to define the different objects of study whose underlying network of molecular interactions can more accurately explain