Walnut Creek, Calif.--Commerce One and Chemdex Corp. said Monday they'll work together to make sure Chemdex's marketplace for life science products works seamlessly with Commerce One's corporate purchasing services. The deal underscores how Internet marketplaces such as Chemdex, Mountain View, Calif., are turning to buying services as a way to ensure customer service. Under terms of the agreement, Commerce One, Walnut Creek, Calif., will tweak its automated purchasing technology to provide transparent access to the Chemdex site. All of its automated requisitioning, purchasing and settlement applications will work when a customer buys products from Chemdex-listed vendors. For Chemdex, the move means it will reach large corporate customers, who seek a single Internet service for processing transactions.