PeerJ Author 270 Points Contributions by role Author 270 Contributions by subject area Biochemistry Cell Biology Biotechnology Developmental Biology Molecular 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 2 December 12, 2022 A synthetic cell density signal can drive proliferation in chick embryonic tendon cells and tendon cells from a full size rooster can produce high levels of procollagen in cell culture Richard I. Schwarz https://doi.org/10.7717/peerj.14533 PubMed 36530397 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