In the course of feeding experiments in which mono-, di-, and trimethylamines were fed to dogs, it was desirable to determine the urinary excretion of methylamine (monomethylamine). The available methods were found to be cumbersome and not well adapted to the routine analysis of a large number of urines. Weber and Wilson (1) separated ammonia from the amines by the use of yellow mercuric oxide ...

The enzyme which catalyzes the phosphorylation of glucose and fructose was described in 1927 by Meyerhof (1). He found that muscle extracts which split polysaccharides and hexose phosphates to lactic acid but were unable to ferment hexoses could be enabled to ferment glucose and fructose by addition of a protein fraction from bakers’ yeast. The same protein fraction activated the aerobic oxidat...

PREVIOUS genetic studies have conclusively established the order of the three structural genes in the galactose operon to be epimerase-transferasekinase (see Figure 1 ) ( ADLER and KAISER 1963; BUTTIN 1963b; ADLER and TEMPLETON 1963). The elegant work of ADLER and TEMPLETON (1963) and subsequently of KAYAJANIAN (1965), DAVISON, FRAME and BISHOP (1967), and PFEIFFER and OELLERMAN ( 1967) have de...