Does Google (GOOG) want to be the next Amgen (AMGN)? The Internet search leader disclosed in a regulatory filing Tuesday that it had invested $3.9 million in a new start-up called 23andMe, a firm that the filing describes as “an early stage biotech company focused on helping consumers understand and browse their genome.”

What does browsing the genome have to do with browsing the Web? Not much on the surface. But Google’s investment makes a lot more sense when you keep reading the filing. 23andMe was co-founded by Anne Wojcicki, who is the new wife of Google co-founder Sergey Brin (they wed earlier this month). According to the filing, Brin provided $2.6 million in interim debt financing to 23andMe and that was repaid as part of the recent round of financing.