| It was shown also that the same critical concentration of spermidine induces aggregation and catenation of DNA rings by topoisomerases. |
| These lower bands corresponded to species of reduced degrees of catenation. |
| The helical repeat of doublestanded DNA varies as a function of catenation and supercoiling. |
| Experimentally, there appears to be no practical upper limit to catenation involving carbon. |
| Next to carbon, boron probably has the richest chemistry with regard to catenation, which is the formation of chains of atoms of the same element. |
| Microconidia are formed from phialides in false heads by basipetal division, the developmental mode from the apex toward the base without catenation of cells. |
