Purpose: Several scoring systems to evaluate patients with hepatocellular carcinoma (HCC) exist. A good scoring system should provide information on prognosis and guide therapeutic decisions. The ...

Sigma-Aldrich has launched a significantly expanded 5th edition of The Sigma-RBI Handbook of Receptor Classification and Signal Transduction, available both online and in print. The Handbook has been ...

G-protein-coupled receptors (GPCRs) are one of the largest families of cell surface proteins in the human body that recognize hormones, neurotransmitters, and drugs. These receptors regulate a wide ...

Opioid receptors are proteins in the nervous system that interact with opioids. Opioid receptors are part of the endogenous opioid system. This is the body’s internal system for regulating pain, ...