Ltw-1 MGI:88049 Sep-1 O genetic mapping + apolipoprotein A-I Apoa1 Alp-1|Apoa-1|Sep-2|Sep-1|Sep2|Lvtw-1|Ltw-1|Brp-14 Gene Brp-14 Apoa-1 Alp-1 Sep-2 http://identifiers.org/mgd/MGI:88049 Lvtw-1 Sep2 protein coding gene