Common use of Lock-up Letter Clause in Contracts

Lock-up Letter. To the extent that the Closing hereunder shall have occurred prior to February 7, 1999, Seller shall have delivered a Lock-up Agreement (the "Lock-up"), in substantially the form attached hereto as Exhibit D, to Dirk▇ & ▇ompany, Inc. and Security Capital Trading, Inc., as representatives of the several underwriters in connection with Ophidian's offering of Units consisting of shares of Common Stock and warrants to purchase Common Stock pursuant to that certain prospectus dated May 7, 1998.