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:	S154
P-Site Sequence:	EPPTLRRSTSLRRLG
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	S154	EPPTLRRSTSLRRLG	100 / 9 AA	63
Phosphosite 1:	USP21	Q9UK80	T155	PPTLRRSTSLRRLGG	100 / 8 AA	63
Phosphosite 2:	MYO18A	Q92614	S726	KGGTLQRSTSFRQGP	77 / 9 AA	233
Phosphosite 3:	ALOX12	P18054	T245	PMLLRRSTSLPSRLV	100 / 7 AA	76
Phosphosite 4:	RFX3	P48380	Y499	FAQTLRRYTSLNHLA	87 / 8 AA	84
Phosphosite 5:	RFX2	P48378	Y514	FAQTLRRYTSLNHLA	87 / 8 AA	80
Phosphosite 6:	RFX1	P22670	Y751	FAQTLRRYTSLNHLA	87 / 8 AA	105
Phosphosite 7:	ALOX12	P18054	S244	NPMLLRRSTSLPSRL	100 / 7 AA	76
Phosphosite 8:	MYO18A	Q92614	T1003	QLALRRATSMRKTFT	75 / 8 AA	233
Phosphosite 9:	USP21	Q9UK80	S156	PTLRRSTSLRRLGGF	100 / 7 AA	63
Phosphosite 10:	LIMA1	Q9UHB6	S582	LKKLRRSSSLKERSR	75 / 8 AA	85
Phosphosite 11:	LIMA1	Q9UHB6	S581	DLKKLRRSSSLKERS	66 / 9 AA	85
Phosphosite 12:	MYO18A	Q92614	T727	GGTLQRSTSFRQGPE	75 / 8 AA	233
Phosphosite 13:	Rictor	Q6R327	S1406	NQNTLQRSSSVRSMV	66 / 9 AA	192
Phosphosite 14:	PAR3-beta	Q8TEW8	S573	AMETLRRSMSMEGNI	75 / 8 AA	132
Phosphosite 15:	KLC3	Q6P597	S429	AEQALRRSSSLSKIR	75 / 8 AA	55
Phosphosite 16:	AKAP6	Q13023	S1593	GSDSLQRSTSLESWL	75 / 8 AA	257
Phosphosite 17:	NEDD4	P46934	S456	NHGILRRSISLGGAY	75 / 8 AA	149
Phosphosite 18:	GOLGA7B	Q2TAP0	S14	NLQELRRSASLATKV	85 / 7 AA	18
Phosphosite 19:	UBR4	Q5T4S7	S1042	ILHTLRWSSRLRISS	66 / 9 AA	574
Phosphosite 20:	DYRK1B	Q9Y463	T360	GGWTLRRTKELRKDY	66 / 9 AA	69