1962 年 17 巻 2 号 p. 112-114
The transmissible drug-resistance (R) factor was spontaneously lost on storage from R+cells. It was found that there was segregated or complete loss of R (CM. TC. SM. SA) factor from R+ (CM. TC. SM. SA) cells. FromE. coliEO-1 R+ (CM. TC. SM. SA), E. coliEO-1 R-, R+ (SM. SA) and R+ (TC) were obtained. From these results it will be strongly suggested that R (CM. TC) factor from R+ (CM. TC. SM. SA) cells and R (CM) and R (TC) factors from R+ (CM. TC) cells are segregated.