Georgia Tech/Emory biomedical engineering assistant professor Manu Platt (standing) and graduate student Keon-Young Park examine gels that display the activity levels of cathepsins--protein-degrading enzymes known to accelerate atherosclerosis, osteoporosis and cancer. In a new study, the researchers developed a technique to predict from a blood sample the amount of cathepsins a specific person would produce. (Georgia Tech Photo: Gary Meek)