A nuclear body associated with the histone gene locus that is thought to contain all of the factors necessary for histone mRNA transcription and pre-mRNA processing. In Drosophila, U7 snRNP is located in the histone locus body rather than the distinct Cajal body.
Source:PMID:19620235,
GOC:sart,
PMID:16533947,
PMID:18927579