Fig. 1. 31P-nuclear magnetic resonance spectra for farm system 4 of fecal samples extracted while wet with NaOH-EDTA, water, or dilute HCl. Spectra are expanded to show detailed peak assignments in the region from 8 to –6 ppm. Mono, orthophosphate monoesters; orthoP, orthophosphate; myo-IHP, myo-inositol hexakisphosphate; lipids, phospholipids; TA, teichoic acid; oth. diest., other diesters; pyroP, pyrophosphate; polyP End Grp, polyphosphate end group. See the text for more details on peak assignments in these regions. Note spectra of dilute HCl extracts were limited by the solubility of Ca-P when made to pH >12.5 for analysis.