5 혈청을 포함한 DMEM 배지에 갑상세포주 579를 연속배양하여 약 $5.7 imes 10^{-8}$g/h /cell에 해당하는 pro-UK의 비생산속도를 얻을 수 있었다. 또한 배지의 이동속도가 증가할 수록 glutamine의 소비속도가 증가하는 반면 ammonia 생산속도는 일정하게 유지되는, glutamine의 완전동화에의한 물질생산증가 현상을 나타냈다. 5mM의 glucose와 2mM의 glutamine, 포화용존 공기의 10에 해당하는 용존산소 및 pH 6.2의 maintenance 생육 조건하에서 약 15일간 유지시켜, $12 imes 10^{-8}$g of pro-UK/h/cell의 최대 비생산속도와 0.226mg/g of glucose의 생산수율을 얻었으며, 이는 10ml/min의 배지 이동속도를 유지하는 연속배양 조건에서 매일 0.223mg의 pro-KU를 생산할 수 있을을 의미한다.
Maximum specific pro-UK production rate was achieved at 15 mllmin of perfusion rate as $5.7 imes 10^{-8}$ $mu g$/h/cell by cytostatic cultivation of human cell line 579 with DMEM and 590 FBS. As perfusion rates were increased, glutamine uptake rates were also increased but ammonium production rates remained relatively constant, which resulted in low ratio of ammonium to glutamine at high perfusion rate. Partially it quantitatively explains why the productivity is increased in perfusion cultivations. At maintenance period of 15 days by controlling metabolic process, such as 5 mM of glucose, 2 mM of gtutamine, 10% of air saturation and pH 6.2, high speecific product production rate and product yield on substrate were obtained as $12 imes 10^{-8}$$mu g$/h/cell abd 0.226 mglg of glucose, respetively. This product yield corresponds to 0.223 mg/day of productivity at 10 mllmin of perfusion rate.
