Table 4. Annotation of the histone gene family in Apis mellifera.

Class	Proposed Subclass	Type	Apis Histone Genes	NCBI RefSeq mRNA	Proposed Gene ID	Proposed Protein ID	Splicing Status	Methyl CpG
H1	H1	canonical	GB12700a	XM_001121111	H1.1	H1.A
			GB12218	XM_001122184	H1.2	H1.B
H2A	H2A	canonical	GB18806	XM_001120186	H2A.1	H2A.A
			GB12818	XM_001120346	H2A.2	H2A.B
			GB13800	XM_001119899	H2A.3	H2A.C
			N/Ac	XM_001120934	H2A.4	H2A.D
	H2A.X	variant	GB18954	XM_624697	H2A.X	H2A.X	Spliced	Yes
	H2A.Z/H2AV	variant	GB12991	XM_624164	H2A.Z	H2A.Z	Spliced	Yes
	Pseudogene		Pseudogene		ψH2A
H2B	H2B	canonical	GB12700a	XM_001120238	H2B.1	H2B.A
			GB13012	XM_001120889	H2B.2	H2B.B
			N/Ac	XM_001122218	H2B.3	H2B.C
			GB12922b	XM_001119846	H2B.4	H2B.D
			GB11889	XM_001120014	H2B.5	H2B.D
H3	H3	canonical	GB11223	XM_001120304	H3.1	H3
			GB14620	XM_001121026	H3.2	H3
			N/Ac	XM_001120132	H3.3	H3
	H3.3	variant	GB12948	XM_001120696	H3.3.1	H3.3	Spliced	Yes
			GB11228	XM_624496	H3.3.2	H3.3	Spliced	Yes
	CENPA	variant	GB18566	N/A	CENPA	CENPA	Spliced	Yes
H4	H4	canonical	GB20104	XM_001120066	H4.1	H4
			GB12644a	XM_01119948	H4.2	H4
			GB14107	XM_001120988	H4.3	H4
			GB17789	NM_001011609	H4.4	H4

See Figure S10 for additional details. These Bee Base protein entries are either incorrect or missing:

^achimeras,

^btruncated,

^cnot available.