Haan, P.G. De, Hoekstra, W.P.M., Verhoef, C.
A genetic analysis of recombinants from crosses with recombination-deficient recipients, lacking the ATP-dependent exonuclease activity, demonstrated differences in the inheritance pattern of donor...
Storm, P.K., Hoekstra, W.P.M., Haan, P.G. De, Verhoef, C.
19 independent recombination-deficient mutants were isolated. 7 carried mutations that mapped near or in the recB and recC genes between thyA and argA. 10 mutants carried mutations cotransducible...
Recombination in Escherichia coli III. Mapping by the gradient of transmission (1969)
Haan, P.G. De, Hoekstra, W.P.M., Verhoef, C., Felix, H.S.
Mapping of markers on the Escherichia coli chromosome by the gradient of transmission is presented. The method appeared to be useful and accurate if chromosome withdrawal is prevented and if the...
A relation between linkage frequency of an unselected marker and transfer time based on a physical exchange of genetic material was developed for Escherichia coli crosses. Crosses performed under...
In this paper a mathematical analysis based on the physical exchange of genetic material is presented for a four-factor cross. The incorporation frequency of donor markers and the relative map...
The location of the restriction locus for λ·K in Escherichia coli B (1965)
Hoekstra, W.P.M., Haan, P.G. De
Analysis of recombinants from E. coli K 12 Hfr × E. coli B F− crosses showed that one locus on the chromosome of Escherichia coli, controlling restriction and probably also the modification of...
Vitamin B12. III. The assay of vitamin B12 (1952)
Lens, J., Wijmenga, H.G., Wolff, R., Karlin, R., Winkler, K.C., Haan, P.G. De
1. 1. After the addition of KCN, purified liver-extracts can be chromatographed on Al2O3, the vitamin B12 being collected as one single band which can be measured spectrophotometrically. 2. 2. The...