chromatin heterochromatin https://github.com/geneontology/go-ontology/issues/22355 Wikipedia:Heterochromatin nuclear heterochromatin GO:0035328 A compact and highly condensed form of chromatin that is refractory to transcription. GO:0000792 cellular_component GO:0005720 transcriptionally silent chromatin transcriptionally inactive chromatin NIF_Subcellular:sao581845896