Here we describe the results of an X-ray diffraction analysis of crystals of N 1-methyl cytosine ... found for purines and pyrimidines, but the structure is unusual in that the two bases do ...

Now the synthetic “knockout” of a carboxylic acid in amphotericin B, generated in an exacting ten-step chemical ... methyl group, which had to be incorporated into the amphotericin B structure ...

Uracil is often compared to thymine (T), which is the nucleobase that takes its place in DNA. Both uracil and thymine pair with adenine, but they differ in their chemical structure. Thymine has an ...