Sequence encoding the C1 and C2 domains from Mus musculus lactadherin (encoded by the Mfge8 gene, MGI:MGI:102768). This sequence binds specifically to phosphatidylserine (PMID:12000961). It can thus be used to monitor the subcellular distribution of phosphatidylserine, if fused to an appropriate reporter protein, or to target a tagged protein to a particular subcellular localization via phosphatidylserine binding.