Fig. 2

Eutherian P1 Sperm Protamine Alignment. Alignment showing a selection of sperm protamine P1 amino acid sequences from 10 common eutherian mammals. The full multiple sequence alignment used 145 sequences from the 2019_05 release of the UniProt knowledgebase and was aligned with MUSCLE 3.8.31. Positions with relative entropy score greater than the conservation threshold of 4.135 are highlighted (see Additional file 1: Supplemental Table 1). For full alignment see Supplemental Figure 2