C. Ma

Origins of replication: timing and chromosomal position.

P. Dijkwel, J. Hamlin, J. Vaughn, 1991, Current opinion in cell biology.

Multiple origins of replication in the dihydrofolate reductase amplicons of a methotrexate-resistant chinese hamster cell line

J. Hamlin, T. Leu, C. Ma, 1990, Molecular and cellular biology.

Amplification of DNA sequences in mammalian cells.

P. Dijkwel, J. Hamlin, J. Vaughn, 1991, Progress in nucleic acid research and molecular biology.

The dihydrofolate reductase amplicons in different methotrexate-resistant Chinese hamster cell lines share at least a 273-kilobase core sequence, but the amplicons in some cell lines are much larger and are remarkably uniform in structure

J. Hamlin, W. Flintoff, T. Leu, 1988, Molecular and cellular biology.

Organization and genesis of dihydrofolate reductase amplicons in the genome of a methotrexate-resistant Chinese hamster ovary cell line

J. Hamlin, T. Leu, J. Looney, 1988, Molecular and cellular biology.

Sister chromatid fusion initiates amplification of the dihydrofolate reductase gene in Chinese hamster cells.

B. Trask, J. Hamlin, C. Ma, 1993, Genes & development.

Overexpression of glutathione S-transferase and elevation of thiol pools in a multidrug-resistant human colon cancer cell line.

S. Lin-Chao, C. Chao, Y. ‐. Huang, 1992, Molecular pharmacology.

Increased mdr gene expression and decreased drug accumulation in a human colonic cancer cell line resistant to hydrophobic drug.

S. Lin-Chao, C. Chao, P. Cheng, 1990, Biochemical and biophysical research communications.