Samples should be fixed according to prescribed protocols. We use a modified Karnovsky’s (protocol available upon request). Tousimis sells a ready-to-use product called Tousimis/Johnson Fixative that might be easier than making your own fix. Their web site is: Samples should be shipped according to DOT regulations, in fix, well-capped and in a secondary unbreakable container inside a box to insure safe transport. Samples need to be kept cold for the duration of their transport. Care must be taken that they are not allowed to freeze. If dry ice or frozen-pack is used, insulate the sample to prevent freezing.

You may submit samples to the EM Lab using one of the following methods:

In person. Click here for directions to the EM Lab


By private courier to 1429J Tupper Hall which is on the Davis campus. Tissue would be directly accepted by one of the technicians in the lab.


By a public carrier (e.g. FedEx) EM Lab, Tupper Hall, Room 1429, 530-752-4701, UC Davis, One Shields Avenue, Davis California, 95616. The package should go to the attention of the EM Lab, Patricia Kysar.

Please be sure to send all pertinent information with the sample. What media the sample is currently in is necessary for proper processing. There is a submission form available for SEM or TEM. We do not expect you to know all the details. Use the submission form to the best of your knowledge.

We always appreciate a call to alert us regarding incoming samples. There is an answering machine on 530-752-4701 or you can e-mail Pat Kysar (