FamPlex Epigenetic Entity Source
http://purl.obolibrary.org/obo/FPLX#_Histone_H1 https://pat.nichd.nih.gov/patepigeneticentity/P00000346 LOOM
http://purl.obolibrary.org/obo/FPLX#_Histone_H2B https://pat.nichd.nih.gov/patepigeneticentity/P00000353 LOOM
http://purl.obolibrary.org/obo/FPLX#_Histone_H2A https://pat.nichd.nih.gov/patepigeneticentity/P00000352 LOOM
http://purl.obolibrary.org/obo/FPLX#_Histone_H4 https://pat.nichd.nih.gov/patepigeneticentity/P00000349 LOOM
http://purl.obolibrary.org/obo/FPLX_Histone https://pat.nichd.nih.gov/patepigeneticentity/P00000164 LOOM
http://purl.obolibrary.org/obo/FPLX#_Histone_H3 https://pat.nichd.nih.gov/patepigeneticentity/P00000348 LOOM