Kryn was a graduate student from Developmental Biology. He developed a method to regulate the stability of proteins using small molecules that bind to a tag on the protein and allow it to fold to a stable state. He made stains of mice with this tag inserted into the GSK3b gene and with Hank Bayle a strain with the same tag inserted into the Pax6 gene. This approach has proved to be very useful for the rapid, reversible regulation of genes at the level of the protein. Kryn is presently working with CP Chang and can be reached at Kryn@stanford.edu.