IN THE STATEMENT, COLUMN 1, LINES 5 AND 6, "PEPTIDE-CONTAINING" SHOULD BE DELETED. IN THE STATEMENT, COLUMN 2, LINE 3, "12-12-1989" SHOULD BE DELETED, AND "4-12-1989" SHOULD BE INSERTED. IN THE STATEMENT, COLUMN 2, LINE 4, "12-14-1989" SHOULD BE DELETED, AND "4-14-1989" SHOULD BE INSERTED.