It is important to always open PubMed from a library link, so that you can see the Find It button.
http://www.ncbi.nlm.nih.gov/pubmed/?otool=uutahlib
When you're working off-campus, you will need to login with your CIS credentials.
The paper (PMID = 21275904) is in Biology of the Cell, which is an electronic resource. The publisher's website, however, asks for a login & password when I try to download the PDF file.