For the elemental analysis of biomass, a solids pellet was collected through centrifugation of a culture sample, immediately frozen, and then lyophilized for 48 hrs. Phosphorus content was measured through inductively coupled plasma mass spectrometry (ICP-MS; Model NexION 350D, PerkinElmer) and elemental carbon, nitrogen, and hydrogen were measured with a CHN Analyzer (Model CE440, Exeter Analytical) by the UIUC Microanalysis Laboratory. If replicate results had a greater than 5% difference, the sample was reanalyzed and the results were replaced.