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:	S476
P-Site Sequence:	SRGSIKKSSVGVDFP
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	S476	SRGSIKKSSVGVDFP	100 / 9 AA	63
Phosphosite 1:	USP21	Q9UK80	S477	RGSIKKSSVGVDFPL	100 / 8 AA	63
Phosphosite 2:	SUV420H1	Q4FZB7	S397	NATSNRKSSVGVKKN	77 / 9 AA	99
Phosphosite 3:	PLEKHQ1	Q8TD55	S28	KAGWIKKSSGGLLGF	66 / 9 AA	53
Phosphosite 4:	SUV420H1	Q4FZB7	S398	ATSNRKSSVGVKKNS	85 / 7 AA	99
Phosphosite 5:	TNC	P24821	T726	KFKSIKETSVEVEWD	66 / 9 AA	241
Phosphosite 6:	PLEKHQ1	Q8TD55	S29	AGWIKKSSGGLLGFW	75 / 8 AA	53
Phosphosite 7:	ARHGAP28	Q9P2N2	S91	EIESIKDSSMGGQEE	75 / 8 AA	82
Phosphosite 8:	KLHL3	Q9UH77	S433	PMNTRRSSVGVGVVE	62 / 8 AA	65
Phosphosite 9:	ChaK2	Q9BX84	S1689	NRNSLLKSSIGVDKI	66 / 9 AA	232
Phosphosite 10:	HMG2L1	Q9UGU5	S492	SMKVKASSVGVLSPQ	75 / 8 AA	66
Phosphosite 11:	MOBKL3	Q9Y3A3	S151	SRVSIKESSVAKLGS	75 / 8 AA	26
Phosphosite 12:	FAM86B1	Q8N7N1	S82	SELIKKSSGGSVTLS	85 / 7 AA	33
Phosphosite 13:	FTSJD1	Q8IYT2	S424	NWLVKKSSIGCSTNT	62 / 8 AA	88
Phosphosite 14:	ZMYM1	Q5SVZ6	S459	KSRSIKKSCCADFEC	62 / 8 AA	129
Phosphosite 15:	POLQ	O75417	S708	QEDLIKKSNVNENQD	71 / 7 AA	198
Phosphosite 16:	ZNF385D	Q9H6B1	S166	TTVEIRKSSVMTTEI	83 / 6 AA	42
Phosphosite 17:	ZNF385D	Q9H6B1	S167	TVEIRKSSVMTTEIT	83 / 6 AA	42
Phosphosite 18:	USP26	Q9BXU7	S504	AKCEHKTSVGVHSFS	83 / 6 AA	104
Phosphosite 19:	GRIP1	Q9Y3R0	S609	ISDIKKGSVAHRTGT	71 / 7 AA	122
Phosphosite 20:	LMNB2	Q03252	S560	AMRTVKKSSVMRENE	71 / 7 AA	68