electron microscopic studies of thin sections of a mammary carcinoma that developed in a female mouse of the syngeneic x/gf low-cancer strain after treatments with x-rays ( 3 x 100 rads weekly ) followed by 8 weekly i.p . injections of urethan ( 1 mg/g body weight ) revealed extensive budding of b particles into cytoplasmic vacuoles and numerous characteristic b virions in the vacuolar lumens .
C0005910
body weight
C1521970
characteristic