However, although not anticipated pre-release, following release, participants who had disclosed their HIV status to supportive family or friends noted that these relationships provided important support for linkage to care and medication adherence.
In almost all cases where linkage groups were combined in this way, the recombination frequency between adjacent markers was 0.23 or lower, and the support for linkage was a LOD score of 3.7 or higher.
A rare variant, the Gly180Ser mutation, was previously shown to increase in frequency with increasing BMI, providing further support for linkage between variants of the FFAR1 gene and BMI reported in the present study.
We then performed high-density STR mapping with additional microsatellites across identified linkage peaks in an attempt to obtain more convincing support for linkage.
Two-point linkage analysis under a model with fixed parameters was used to evaluate support for linkage to plasma ACE levels with and without adjustment for the effects of the ACE-linked QTL.
After adjustment for the effect of the ACE gene locus we found that there was modest support for linkage between circulating ACE levels and microsatellite markers on chromosomes 4, 11, and 21.
Fifty-nine AFLP markers (28% of the total) and one dominant IDLE insertion were present in significantly more or fewer F2 plants than expected and could either not be mapped or mapped only by reducing support for linkage groups significantly.
At chromosome 14q21.2 to q24.3 the main support for linkage lies within the Icelandic subset (Table 2) with HLOD 1.24 and α 0.36, unaltered by the addition of other Nordic families.
Estimated genome sizes computed for different statistical support for linkage (LOD 3-4-5) varied from 2,490 to 2,700 cM for the G2 female map, from 2,400 to 2,765 cM for the G2 male map, and from 2,238 to 3,252 cM for the F2 map, with an average of 2,500 cM.
The finding of significant residual familial correlations in different ethnic groups, after accounting for this QTL, and the finding of support for linkage to a locus on chromosome 4 in Mexican-American families strongly suggest that there may well be QTLs for ACE unlinked to the ACE gene.
