TABLE 2.
Interference as judged by NPD ratios
| Set | ade5,7-URA3 | URA3-KAN | KAN-lys5 | lys5-NAT | NAT-HPH | HPH-cyh2 | cyh2-crl3 | crl3-trp5 | trp5-leu1 |
|---|---|---|---|---|---|---|---|---|---|
| I | 0.21 ± 0.06 | 0.28 ± 0.07 | 0.09 ± 0.04 | 0.25 ± 0.10 | 0.0 | 1.57 ± 0.64 | 0.25 ± 0.04 | 0.21 ± 0.06 | 0.18 ± 0.09 |
| II | 0.52 ± 0.04 | 0.31 ± 0.09 | 0.33 ± 0.1 | 0.37 ± 0.26 | 0.55 ± 0.26 | 0.33 ± 0.05 | 0.32 ± 0.09 | 0.22 ± 0.09 |
The ratios observed NPD:expected NPD, with standard errors, were calculated with the aid of Stahl Lab Online Tools( http://groik.com/stahl/) according to the formula of Papazian (1952), for which ratios significantly less than unity demonstrate interference (see materials and methods).