multipoint linkage analysis and studies of haplotypes and recombinants strongly suggest the localization of the vdd1 locus between the collagen type ii alpha 1 ( col2a1 ) locus and clustered loci d12s14 , d12s17 , and d12s6 , which segregate as a three-marker haplotype .
C2699403
collagen
C1413580
col2a1