PeerJ Author 135 Points Contributions by role Author 135 Contributions by subject area Biochemistry Cell Biology Richard I Schwarz PeerJ Author Summary Biochemistry Cell Biology Editing Journals Work details Staff Scientist Lawrence Berkeley National Laboratory Life Sciences PeerJ Contributions Articles 1 October 29, 2013 Cells determine cell density using a small protein bound to a unique tissue-specific phospholipid Christopher J. Petzold, Richard I. Schwarz https://doi.org/10.7717/peerj.192 PubMed 24244914