L-PGDS relative protein expression levels in cell extracts. (A) Relative expression of L-PGDS with and without 2.5 µM SAHA throughout Medicago cell growth obtained from (B) western blot analysis of cell extract samples treated with SAHA on day 3 of growth and (C) on day 7 of growth, with anti L-PGDS antibody. Control experiment lanes: 3, C5, C7 and C11. **p value ≤ 0.01. Error bars indicate S.E.M. for n = 3. Full-length gels and immunoblots are shown in Supplementary Figure S3.