catalase. a heme-containing enzyme that specifically catalyzes the decomposition of hydrogen peroxide and is found in almost all cells except certain anaerobic bacteria. The reaction can be used as a test in the identification of bacteria.1  Facebook.atalase. a heme-containing enzyme that specifically catalyzes the decomposition of hydrogen peroxide and is found in almost all cells except certain anaerobic bacteria. The reaction can be used as a test in the identification of bacteria. 1  Facebook.
The thing is, Josh Marshall is a blogger. The reporters and editors who work for TPM are also bloggers, a term that deserves italics because it is now so broad as to be meaningless. It is, however, inherently diminutive, even when it's being used kindly, which it usually is in relation to TPM.
Marshall Shepherd is former chair of the American Meteorological Society. He directs the Program for Atmospheric Sciences at the University of Georgia. Marshall Shepherd in Forbes: A tweet by Dr. Jason Patton at Oklahoma State Universityinspired this question,