TABLE 2.

Secretion of pheromones among Saccharomyces strains

Strain	Species or strain	Pheromone secretiona on:				Mating type
		MT502 (MATa)	MT503 (MATα)	MT504 (MATα)	MT505 (MATa)
Y184	S. cerevisiae	+++	X	X	+	MATα
Y185	S. cerevisiae	X	+++	+	X	MATa
Y169	S. cerevisiae	X	+++	+	X	MATa
Y170	S. cerevisiae	+++	X	X	+	MATα
Y244	S. bayanus	+++	X	X	+	MATα
Y245	S. bayanus	X	+++	+	X	MATa
Y339	S. exiguus	+++	+	X	+	MATα
Y345	S. exiguus	X	+++	X	X	MATa
Y257	S. castellii	X	+++	+	X	MATa
Y344	CBS 6463	X	+++	X	X	MATa

^aSymbols: X, no response; +, weak signal; +++, strong signal.