Table 3.

Receptor internalization is important for partner discrimination

Strain	Relevant genotype	RIa	Fold difference	Mating efficiency, %
DMY171	ste2Δ URA3::STE2	0.95 × 10−5	N/Ab	51.2
LHY848	ste2Δ URA3::ste2-337R-340Stop	9.08 × 10−3	956	34.0
LHY844	ste2Δ URA3::ste2-337R,340-UBIK48R	1.66 × 10−2	1747	12.3
LRB758	YCK1 YCK2 at 23°C	3.2 × 10−6	N/A	58.9
LRB758	YCK1 YCK2 at 37°C	3.8 × 10−6	N/A	61.1
LRB756	Δyck1, yck2ts at 23°C	4.8 × 10−6	1.5	5.2
LRB756	Δyck1, yck2ts at 37°C	1.8 × 10−4	47	0.7

^a The randomness index (RI) was obtained by dividing the number of diploids formed with nonsecretors by the number of diploids formed with secretors (Schrick et al., 1997).

^b N/A, not applicable.