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Table 1 P450 Aromatase in the adult male reproductive system.

From: Estrogen in the adult male reproductive tract: A review

Species Leydig cells Sertoli cells Germ cells Spermatozoa References
Mouse1 +   + + [49, 74]
Rat1 +   + + [31, 32, 34, 36, 38, 69, 75, 77, 81, 151154]
Rooster    + + [76]
Bear2 + + +   [155]
Boar +     [156]
Ram +     [157]
Stallion + + +   [158160]
Bank vole + + +   [79, 161, 162]
Rainbow trout fish +     [163]
Dogfish shark    +   [164, 165]
Marmoset    +   [151]
Rhesus +   +   [166]
Human    + + [72, 73, 80, 151]
  1. 1 Early work showed only Leydig cells being positive for Aromatase in the adult testis 2 Location depended upon the season[155].