First, he noted that the nucleotide composition of DNA varies ... that A bound to T and C bound to G within the molecular structure of DNA (Figure 2). Chargaff's realization that A = T and C ...

Determining structures of large molecular assemblies by methods including crystallography, electron microscopy and other imaging techniques will require clever chemical means of trapping and ...

This knowledge laid the foundation for the field of molecular genetics and paved the ... meaning it has the same chemical formula but a different structure. It is often referred to as the "fifth ...