“…However, most of the recent data in support of this view are general rather than specific in character. Kligler et al (148,149) reported that nicotinic acid and thiamine are required if glucose is present in the medium, but not if it is absent. Many papers have been published showing that thiamine (119,(321)(322)(323)358, 360, 365); riboflavin (2, 143), pantothenic acid (26, 78, 120), and nicotinic acid (or coenzyme I) (82, 211) increase respiration (oxygen uptake, carbon dioxide production or methylene blue reduction) by cells (e.g., Staphylococcus aureus, Propionibacterium pentosaceum, Proteus morganii, Lactobacillus mannitopoeus, dysentery bacilli, Hemophilus parainfluenzae) acting on various substrates (e.g., glucose, lactate, pyruvate).…”