Fig. 1

Types of comet obtained from the alkaline comet assay. a Positive control. Predominance of type 3 is observed, which means that over 50 % of the DNA has migrated from the core. Magnification: 10×. b Exposed individual who had comets type 1, 3, and 4, although type 3 was the predominant after making the total count. Magnification: 10×. c Non-exposed individual. The observable comets correspond entirely to type 1, where less than 25 % of the DNA has migrated. Magnification: 10×. d In this exposed individual, comets type 1, 2, 3 and 4 are observable, being type 4 the predominant after making the total count. Magnification: 10×