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EXISTENCE OF SOLUTIONS FOR GRADIENT TYPE ELLIPTIC SYSTEMS WITH LINKING METHODS
Ying hua Jin,Q Heung Choi 충청수학회 2007 충청수학회지 Vol.20 No.1
We study the existence of nontrivial solutions of the Gradient type Dirichlet boundary value problem for elliptic systems of the form ¡¢U(x) = rF(x;U(x)),x 2 , where ½ RN(N ¸ 1) is a bounded regular domain and U = (u; v) : ! R2. To study the system we use the liking theorem on product space.
YoungJooLee,임원청,YingHuaJin,이승기 생화학분자생물학회 2002 Experimental and molecular medicine Vol.34 No.2
The estrogen receptor (ER), a member of the nuclearhormone receptor superfamily recruits coactivatorsthat modify local chromatin structure. Here weinvestigated the effect of the estrogen receptor andestrogen on the global chromatin structure and thelocal chromatin structure of the progesterone recep-tor gene during the process of transcriptional acti-vation using Rat1+ER cells stably expressing theestrogen receptor. The total chromatin was moreaccessible to DNaseI in Rat1+ER cells than in theparental estrogen receptor-negative Rat1 cells. After18 h of estrogen treatment, total chromatin wasmore dispersed in Rat1+ER cells than in Rat1 cells.The chromatin structure of the progesterone recep-tor gene was more sensitive to DNaseI in Rat1+ERcells than in Rat1 cells. However, the chromatinstructure of the progesterone receptor gene did notchange further on estrogen treatment. Our resultssuggest that under certain circumstances unoccu-pied estrogen receptors may play some role in reor-ganizing the repressive chromatin structure toinduce gene activation.