Table 3.

Sperm chromatin structure in different mammalian species

Specie	Histone	Protamine type	Transition protein	Reference
Boar	Present	P1	–	[26]
Bull	–	P1	–	[27, 28]
Man	Present	P1, P2	Present	[29]
Mouse	Present	P1, P2	Present	[30–32]
Rabbit	–	P1	–	[33]
Ram	–	P1	Present	[27]
Rat	–	P1	Present	[34]
Stallion	–	P1, P2	–	[27, 35, 36]