Shannon Kelleher, Penn State (image) Penn State Share Print E-Mail Caption Shannon Kelleher, Penn State associate professor of cellular and molecular physiology, studies the role of zinc and its transporters in breast development and lactation. Kelleher looks at the effects of zinc in mice before she studies women. Credit Patrick Mansell, Penn State Usage Restrictions non commercial use only Share Print E-Mail 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.