Richard J. Roberts

PubMed Central is vital for researchers and the public alike. Only through free access can everyone find out where the cutting edge of research lies. With access to the latest studies, patients and their families have a much-needed piece of the puzzle as they consider treatment options and potential outcomes.

Hard as it is to imagine, there's a move afoot in Congress to take away the public's free online access to tax-funded medical research findings. That would be bad for medical discovery, bad for patients looking for the latest research results, and another rip-off of the American taxpayer.

During normal cell metabolism, RNA is constantly being made and broken down. The purine and pyrimidine residues are reused by several salvage pathways to make more genetic material. Purine is salvaged in the form of the corresponding nucleotide, whereas pyrimidine is salvaged as the nucleoside.

I want to tell mayors, county chiefs and heads of big companies: don't just chase GDP growth; don't chase the biggest profits at the expense of our children and grandchildren and at the cost of sacrificing our ecological environment.

To ask questions can become the laziest and wobbliest occupation of a mind, but when you must yourself answer the problem that you have posed, you will meditate your question with care and frame it with precision.