Video 1

Stained human spermatazoa showing the movement of the large extra-mitochondrial formazan deposit in an anterior direction. This video ( is available from the online version of the article at

Patterns of MTT reduction in mammalian spermatozoa

Robert John Aitken, Diatsendoula Gregoratos, Leslie Kutzera, Emma Towney, Minjie Lin, Alexandra Wilkins, and Zamira Gibb

2020. 160:431-445 DOI: 10.1530/REP-20-0205