Paul On Pong Ts'o (Chinese: 曹安邦; 17 July 1929 – 2 December 2009) was a Hong Kong-born biophysical chemist.
Ts'o remained with the Bonnor laboratory for seven years as a research fellow, then joined the Johns Hopkins University faculty.
He was appointed to a full professorship in 1967 and retired from teaching in 2002, thereafter serving as a senior associate at Johns Hopkins.
[1][2] His activities in Taiwan included chairing the Advisory Committee of the Academia Sinica's Molecular Biology Institute and organizing what became the Clinical Cancer Research Center.
[1] Ts'o died on 2 December 2009 at Johns Hopkins Hospital, aged 80.