SPECIFIC, SOLUBLE FACTOR INVOLVED IN SEXUAL AGGLUTINATION OF THE YEAST HANSENULA WINGEI

Abstract

Taylor, Neil W. (Northern Regional Research Laboratory, Peoria, Ill.). Specific, soluble factor involved in sexual agglutination of the yeast Hansenula wingei . J. Bacteriol. 87: 863–866. 1964.—A factor was liberated by snail enzymes from unisexual mating type 5 of Hansenula wingei NRRL Y-2340. This factor is the (or a) factor on type 5 involved in sexual agglutination of H. wingei because it agglutinates only the active opposite mating type; it is absorbed appreciably only by the active opposite mating type; and it is inactivated by a mercaptan, the same agent which inactivates sexual agglutination in type 5. The sedimentation rate of the factor, 31 Svedbergs, indicates it to be soluble.