Hematocrit/hemoglobin Quantitative Trait Locus 2, is also known as hematocrit/hemoglobin quantitative trait locus on chromosome 9. An important gene associated with Hematocrit/hemoglobin Quantitative Trait Locus 2 is HCHGQ2 (Hematocrit/Hemoglobin Quantitative Trait Locus 2). Affiliated tissues include heart.