Structure of the N-terminal Extension of Human Aspartyl-tRNA Synthetase: Implications for its biological function - Cheong, Hae-Kap; Park, Jin-Young; Kim, Eun-Hee; Lee, Chulhyun; Kim, Sunghoon; Kim, Youngsoo; Choi, Byong-Seok; Cheong, Chaejoon (Biological Magnetic Resonance Bank, 2003)