TY - JOUR AU - M Akeson AU - D Branton AU - John Kasianowicz AU - E Brandin AU - D Deamer C2 - Biophysical Journal DA - 1999-12-01 00:12:00 LA - en M1 - 77 PB - Biophysical Journal PY - 1999 TI - Microsecond time-scale discrimination among polycytidylic acid, polyadenylic acid, and polyuridylic acid as homopolymers or as segments within single RNA molecules ER -