594 



NEW AND UNIDENTIFIED GROWTH FACTORS 



TABLE I 

 Some Additional Unidentified Factors 



Factor 



References 



Remarks 



Growth factors for chicks 

 From bran 

 From yeast 

 From fish meal, yeast 

 From liver 



From whey 

 From grass juice 



From fermentation products 



From peanut meal 

 Factors for egg production and 

 hatchability 

 From liver, whey 

 Growth and antiperosis agents 

 for turkeys 

 From yeast, whey 

 From liver, fish meal, whey 



Antipancreatic fibrosis factor 

 for ducks 



From cornstarch 

 Antiliver, kidney necrosis fac- 

 tors for rats 



From cornstarch 



From yeast 

 Growth factor for rats 



From fish solubles 

 "Stress factors" for rats 



From liver 



"Stress factors" for mice 

 From liver, cottonseed 



Growth factors for mink 



From liver, whey 

 Monkey antianemia factor 



Growth factor for foxes 

 From liver, whey 



Growth factor for corn borer 



Potato eelworm hatching factor 



Growth factor for Treponemata 

 From enzymatic protein di- 

 gests 



Cravens et alM^ 



Cravens et alM^ 



Savage et alM^ 



Combs et oZ.,"' Menge et al. 



143, 148 



Menge et al.»8. m 



Kohler and Graham'sc i5i 



Stokstad et aj.'^' 

 Young et aZ.i^s 



Couch et aZ.'66 



Scott>" 



Atkinson and Couch, 's* Mc- 

 Ginnis et aZ.,'^' Briggs,'^" 

 Menge and Combs'''* 



Miller's' 



Baxter'62 



Schwarz»63 ("factor 3") 



King and Hauge'" 



Ershoff'»« 



Bosshardt and Huff'" 



Schaefer et al.,"' Tove et al." 

 Cooperman et aZ.'" 



Schaefer et al."^ 

 Beck et al."*- '" 

 Calam et aL'" 



Eagle and Steinman'S"' 'S' 



Probably numerous duplications 

 (see text) 



Related to orotic acid?''" 



Thought to be identical with grass 

 juice factor for guinea pigs and 

 rats'52 



Effect may be produced by anti- 

 biotics'" 



Two factors claimed'^" 

 Effects most pronounced when sup- 

 plemented with antibiotics'*' 



May be related to factor for ducks, 

 above's' 



May be related to B12 



Required during feeding of thyroid 

 extract; B12 partly active, '^5. 16« 

 also lyxoflavin (see text)"" 



Similar to above; synthesis of fatty 

 acids may be controlled by fac- 

 tors'^' 



Four claimed; one is probably Bij"' 

 Deficiency induced through defi- 

 ciency of several individual vita- 

 mins; curable by folic acid but 

 believed non-identical"^ 



Basal diet probably deficient in 

 B12; similar to mink diet'^ 



Leaf extracts including grass juice 

 concentrates'*^ are active 



Low molecular weight acid-lac- 

 tone;'" may be similar to ger- 

 mination factors for Striga"* and 

 Orobanche^''^ 



Replaceable by serum albumin"' 

 which functions as a carrier for 

 oleate or other lipids'^ 



