Note - Blast analyses are based on comparisons of the phosphosites and the bordering four amino acids on each side of these phosphosites.

Phosphosite
Human Protein:	USP21
Human P-Site:	S156
P-Site Sequence:	PTLRRSTSLRRLGGF
UniProt:	Q9UK80
Intern. Prot. ID:	IPI00007262

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	USP21	Q9UK80	S156	PTLRRSTSLRRLGGF	100 / 9 AA	63
Phosphosite 1:	USP21	Q9UK80	T155	PPTLRRSTSLRRLGG	100 / 8 AA	63
Phosphosite 2:	USP21	Q9UK80	S154	EPPTLRRSTSLRRLG	100 / 7 AA	63
Phosphosite 3:	KIAA1522	Q9P206	S431	QLSGRSVSLRKLKRP	75 / 8 AA	107
Phosphosite 4:	CLCN7	P51798	S268	ISQGRSTSLKRDFKI	85 / 7 AA	89
Phosphosite 5:	CLCN7	P51798	T267	GISQGRSTSLKRDFK	85 / 7 AA	89
Phosphosite 6:	DNAH6	Q9C0G6	S1291	VEEAMFTSLRRLCKA	100 / 6 AA	476
Phosphosite 7:	STOX2	Q9P2F5	T8	MKKTRSTTLRRAWPS	85 / 7 AA	103
Phosphosite 8:	STOX2	Q9P2F5	T7	_MKKTRSTTLRRAWP	85 / 7 AA	103
Phosphosite 9:	KIF13B	Q9NQT8	S1778	TGPVRRRSTGLRLGA	85 / 7 AA	203
Phosphosite 10:	GDF5OS	Q5U4N7	T98	KPRPRRSTALPRSQA	75 / 8 AA	28
Phosphosite 11:	BTF3	P20290	S161	LGADSLTSLRRLAEA	100 / 6 AA	22
Phosphosite 12:	PLEKHA6	Q9Y2H5	S443	ELDAASSSLRRLSLQ	85 / 7 AA	117
Phosphosite 13:	GR6	O15544	S20	SELVSSTSLPRLSVS	85 / 7 AA	16
Phosphosite 14:	ERI2	A8K979	S569	CSPVRSSSWRRLPSI	75 / 8 AA	77
Phosphosite 15:	KIF13B	Q9NQT8	T1779	GPVRRRSTGLRLGAP	85 / 7 AA	203
Phosphosite 16:	SPTBN4	Q9H254	S2106	AWEERFSSLRRLTTI	75 / 8 AA	289
Phosphosite 17:	Protein FAM75D1	Q6ZQQ2	S1024	SKDGASTSLRRGTTD	100 / 6 AA	176
Phosphosite 18:	PPHLN1	Q8NEY8	T397	KKRVRRTTQLRRTTG	75 / 8 AA	53
Phosphosite 19:	MYO18A	Q92614	S1004	LALRRATSMRKTFTT	62 / 8 AA	233
Phosphosite 20:	SFRS7	Q16629	S175	LRRSRSASLRRSRSG	85 / 7 AA	27