| Study Attribute | Value | 
|---|---|
| CEBS Accession Number: | 002-01934-0010-0000-0 | 
| Chemical Name: | Cytembena | 
| CASRN: | 21739-91-3 | 
| NTP Study Type: | Genetic Toxicology - Mammalian Cell Mutagenicity | 
| NTP Study ID: | 644192 | 
| Study Result: | Positive | 
Studies are indicated to be "Nontoxic" when the observed reductions in relative total growth did not indicate that the maximum tolerated dose was achieved.
| Conc. ug/mL | Cloning Efficiency | Relative Total Growth | Mutant Colonies | Mutant Frequency | Avg Mutant Frequency | ||
|---|---|---|---|---|---|---|---|
| Vehicle Control | Dimethyl Sulfoxide | 0 | 88 | 105 | 102 | 39 | 47 | 
| 100 | 92 | 131 | 44 | ||||
| 107 | 103 | 154 | 48 | ||||
| 104 | 100 | 184 | 59 | ||||
| Test Chemical | Cytembena | 6.25 | 110 | 104 | 125 | 38 | 41 | 
| 108 | 92 | 141 | 43 | ||||
| 12.5 | 139r | 104 | 164 | 39 | |||
| 104 | 91 | 133 | 42 | ||||
| 25 | 92 | 74 | 148 | 54 | 51 | ||
| 91 | 85 | 133 | 49 | ||||
| 50 | 89 | 59 | 307 | 115 | 109* | ||
| 93 | 51 | 288 | 103 | ||||
| 100 | 25 | 2 | 335 | 441 | 452* | ||
| 26 | 4 | 368 | 463 | ||||
| Positive Control | Methyl Methane Sulfonate | 15 | 68 | 40 | 408 | 200 | 202* | 
| 56 | 37 | 343 | 203 | ||||
| Methyl Methane Sulfonate | 250 | 78 | 59 | 525 | 225 | 199* | |
| 79 | 71 | 407 | 173 | ||||
| Conc. ug/mL | Cloning Efficiency | Relative Total Growth | Mutant Colonies | Mutant Frequency | Avg Mutant Frequency | ||
|---|---|---|---|---|---|---|---|
| Vehicle Control | Dimethyl Sulfoxide | 0 | 65 | 91 | 93 | 48 | 50 | 
| 83 | 101 | 113 | 45 | ||||
| 81 | 104 | 128 | 53 | ||||
| 80 | 104 | 133 | 55 | ||||
| Test Chemical | Cytembena | 25 | 67 | 59 | 227 | 114 | 134* | 
| 63 | 57 | 291 | 154 | ||||
| 50 | 43 | 16 | 617 | 478 | 464* | ||
| 49 | 17 | 656 | 449 | ||||
| 75 | 19 | 2 | 349 | 618 | 603* | ||
| 21 | 3 | 368 | 589 | ||||
| 100 | |||||||
| Positive Control | Methyl Methane Sulfonate | 15 | 34 | 25 | 256 | 255 | 233* | 
| 35 | 25 | 223 | 211 | ||||
| Methyl Methane Sulfonate | 250 | 60 | 77 | 365 | 204 | 224* | |
| 63 | 72 | 461 | 243 | ||||
Asterisks(*) indicate significant responses.
r = rejected value due to quality control criteria
# = reduced sample size because of the loss of one culture dish due to contamination
 
                        