Gene expression of Flk-1A was analyzed by quantitative real time polymerase chain reaction (qRT-PCR) on day 10 and 14 in avian growth plate of normal, thiram, FK228 treated avian chicks. Data expressed in arbitrary units as the means ± SE (n = 6 for each group). Control group set to one thus equivalent to the N-fold difference. a, b, c letters designate significant difference (P <0.05).