Fig. 6From: Dual positive and negative control of Chlamydomonas PII signal transduction protein expression by nitrate/nitrite and NO via the components of nitric oxide cycleEffects of guanylate cyclase inhibitor on GLB1 repression in medium containing nitrate and ammonium. GLB1 transcript levels were determined in Chlamydomonas cells of cw15–325 strain grown in ammonium-containing medium and transferred to media containing 4 mM NO3− + 7.5 mM NH4+ with or without 1 μM, 2.5 μM, 5 μM or 7.7 μM 1H-[1,2,4]oxadiazolo-[4,3-a]quinoxalin-1-one (ODQ). Values are means ± SE of three biological replicates and three technical replicates and are given as expression level relative to a house-keeping gene RACK1 that has a value of 1Back to article page