Misty Borja: Estimation of Cu Turnover in The Visceral Complex of Littorina littorea  By Isotopic Ratio Analysis Using ICP-MS. The authors would like to thank the following people for their support in seeing this project to completion; Michelle Woo, Jason Manack, Jennifer Deitch, CRG Marine Laboratories and Richard Meraz. Special thanks to Ramon Valencia, who not only taught us the ins and outs of the HPLC/ICP-MS system, but has been our moral and technical support during the most trying of times.  This research was made possible by the SAS Jensen Scholarship Program and MSD Research Program and was funded by NIH Grants 1-R15 GM47702-01 and GM 08238-05 subproject 8 together with funds NSF Grants DBI-9978806 and OCE-9977564 and from an internal “Minigrant”awarded by CSULB.