Integrating vectors were digested with AseI and concentrated by ethanol precipitation. Transformations were conducted as previously described (2 (link)), with 3 μg of DNA and 30 μg of blocking DNA (Ultrapure salmon sperm DNA - Invitrogen). Transformants were plated using the top agar method on 100 μg/ml Hygromycin B and grown under 100 μmol m−2 s−1 for 3 weeks. Individual lines were transferred to 500 μl of F/2 with 100 μg/ml Hygromycin B (GoldBio) in a 96 deep well plate (Evergreen Biotech). Cultures were then maintained on solid plates.