EXTENSION OF EMPLOYMENT AGREEMENT DATE: March 31, 1999 PARTIES: Techne Corporation, a Minnesota corporation 614 McKinley Place N.E. Minneapolis, Minnesota 55413 Marcel Verronneau AGREEMENTS: The parties hereby agree that the termination date of the...

                     EXTENSION OF EMPLOYMENT AGREEMENT


DATE:      March 31, 1999

PARTIES:   Techne Corporation, a
           Minnesota corporation
           000 XxXxxxxx Xxxxx X.X.
           Xxxxxxxxxxx, Xxxxxxxxx  00000

           Xxxxxx Xxxxxxxxxx


AGREEMENTS:

The parties hereby agree that the termination date of the Employment Agreement 
between them dated March 8, 1996 originally for the period July 1, 1995 through 
June 30, 1998 is extended to June 30, 2001.  All other provision of such 
Employment Agreement shall remain in full force and effect.


                                          TECHNE CORPORATION



                                  By      /s/ Xxxxxx X. Xxxxx              
                                          -------------------------------		
                                          Xxxxxx X. Xxxxx, President
                                          "Company"


                                          /s/ Xxxxxx Xxxxxxxxx             
                                          ------------------------------ 
                                          Xxxxxx Xxxxxxxxxx
                                          "Employee"