정성철 교수는 의과대학 생화학교실 교수로 생화학과 유전학을 강의하고 있다. 스핑고지질 대사연구와 유전성대사질환 및 신경계 유전질환에 대한 생화학적-분자유전학적 기전연구, 유전성대사질환에 대한 효소치료제 및 희귀유전질환에 대한 세포-유전자치료법 개발 등을 수행하고 있으며, 생화학분자생물학회, 대한유전성대사질환학회, 대한의학유전학회, 한국조직공학재생의학회 등에 소속되어 활동하고 있다.
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