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:	S477
P-Site Sequence:	RGSIKKSSVGVDFPL
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	S477	RGSIKKSSVGVDFPL	100 / 9 AA	63
Phosphosite 1:	USP21	Q9UK80	S476	SRGSIKKSSVGVDFP	100 / 8 AA	63
Phosphosite 2:	SUV420H1	Q4FZB7	S397	NATSNRKSSVGVKKN	85 / 7 AA	99
Phosphosite 3:	SUV420H1	Q4FZB7	S398	ATSNRKSSVGVKKNS	85 / 7 AA	99
Phosphosite 4:	PRG2	Q6T4P5	S353	LGSLKRASVDVDLLA	55 / 9 AA	76
Phosphosite 5:	KLHL3	Q9UH77	S433	PMNTRRSSVGVGVVE	55 / 9 AA	65
Phosphosite 6:	KLHL2	O95198	S439	PMNTRRSSVGVGVVG	55 / 9 AA	66
Phosphosite 7:	PLEKHQ1	Q8TD55	S29	AGWIKKSSGGLLGFW	75 / 8 AA	53
Phosphosite 8:	PLEKHQ1	Q8TD55	S28	KAGWIKKSSGGLLGF	75 / 8 AA	53
Phosphosite 9:	SLC6A18	Q96N87	S86	GQRLRKGSVGVWTAI	62 / 8 AA	71
Phosphosite 10:	HMG2L1	Q9UGU5	S492	SMKVKASSVGVLSPQ	75 / 8 AA	66
Phosphosite 11:	KIAA1522	Q9P206	S971	PPVARKPSVGVPPPA	71 / 7 AA	107
Phosphosite 12:	ZNF613	Q6PF04	S154	KRYEIKNSVGVNGDG	71 / 7 AA	70
Phosphosite 13:	FTSJD1	Q8IYT2	S424	NWLVKKSSIGCSTNT	62 / 8 AA	88
Phosphosite 14:	FAM86B1	Q8N7N1	S82	SELIKKSSGGSVTLS	85 / 7 AA	33
Phosphosite 15:	USP26	Q9BXU7	S504	AKCEHKTSVGVHSFS	71 / 7 AA	104
Phosphosite 16:	RICS	A7KAX9	S655	PQNKMKKSPVGSWRS	71 / 7 AA	231
Phosphosite 17:	ZNF385D	Q9H6B1	S166	TTVEIRKSSVMTTEI	83 / 6 AA	42
Phosphosite 18:	ZNF385D	Q9H6B1	S167	TVEIRKSSVMTTEIT	83 / 6 AA	42
Phosphosite 19:	POLQ	O75417	S708	QEDLIKKSNVNENQD	71 / 7 AA	198
Phosphosite 20:	NAP5	O14513	S1182	LNEASKSSVAVNKSK	71 / 7 AA	209