Integral outer membrane receptors for iron chelates and vitamin B 12 carry out specific ligand transport against a concentration gradient. Energy for active transport is obtained from the ...

When you have extra time or are trying to beat boredom, this list of fun, easy-to-start hobbies is worth trying this year if you need a little change in your life or you want to hone new skills.

Silver Sneakers, Renew Active and Silver and Fit are the most popular fitness programs covered by Medicare Advantage and Medigap plans. These fitness plans typically cover gym memberships, fitness ...