T-Helper Cell (image) European Molecular Biology Laboratory Caption Teichmann and colleagues, using data from single-cell genomics experiments, found that type 2 T-helper cells produce a steroid involved in immune cell regulation. Credit National Institutes of Health Usage Restrictions Policy regarding use EMBL press releases are copyrighted by EMBL. They may be freely reprinted and distributed for non-commercial use via print, broadcast and electronic media, provided that proper attribution to authors, photographers and designers is made. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.