Carlsbad-based biotechnology developer Verdezyne said this morning that it has hit a key production milestone. The company--which is developing processes for developing renewable chemicals--said it has produced more than one metric ton of bio-based dodecanedioic acid (DDDA) using its proprietary yeast platform and downstream process. DDDA is a precursor to such products as nylon, molding resins, lubricants, adhesives, and powder coatings as well as such products as toothbrushes, fishing line, and other similar products. The company said the milestone proves the scalability of its process. Verdezyne is venture backed by BP Alternative Energy Ventures, DSM Venturing B.V., OVP Venture Partners and Monitor Ventures.