The nitrogen-containing ring structures are at the hub of metabolism and include ATP, nucleic acids, many coenzymes, metabolic regulators and integrators such as adenosine and GTP, signalling compounds such as cyclic nucleotides and plant cytokinins and biochemically functional pigmets of which haemoglobin, the cytochromes and chlorophyll are examples.
This important book collates and integrates current knowledge of all the biologically important N-heterocyclic compounds, covering the relationship between their chemical structures and physiological functions within this key group of...

This is the story of my family and their beginning in Iberia many thousands of years ago. It opens with a young girl trying to escape her captors who want to sell her off as a slave. She survives her escape and dwells in the camp of a peaceful but powerful Celtic warrior class dominated tribe in the Spanish Pyrenees Mountains of northern Spain. My grandfather of a generation before her arrival had seen the danger's that will always pursue his people and the generation she enters has decided to seek a safer land elsewhere. After consulting with the Basque sailors who reside west of them his...