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:	S488
P-Site Sequence:	DFPLQRLSLGDFASD
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	S488	DFPLQRLSLGDFASD	100 / 9 AA	63
Phosphosite 1:	TRAD	O60229	T2050	QEINQRLTLSDFLIK	75 / 8 AA	340
Phosphosite 2:	FIBP	O43427	S195	KKKLQYLSFGDFAFC	77 / 9 AA	42
Phosphosite 3:	SPEG	Q15772	S1186	QGELERLSIPDFLRP	66 / 9 AA	354
Phosphosite 4:	DVL2	O14641	T39	PVPAERITLGDFKSV	62 / 8 AA	79
Phosphosite 5:	TMEM200B	Q69YZ2	S290	WPRLDRLSLGGYAKL	66 / 9 AA	33
Phosphosite 6:	DDEF1	Q9ULH1	Y767	RDKQRLSYGAFTNQI	75 / 8 AA	106
Phosphosite 7:	DDEF1	Q9ULH1	S766	PRDKQRLSYGAFTNQ	75 / 8 AA	106
Phosphosite 8:	TAS2R3	Q9NYW6	S42	WFKTKRMSLSDFIIT	62 / 8 AA	36
Phosphosite 9:	NLRP2	Q9NX02	S846	KCFLQRLSLENCHLT	75 / 8 AA	121
Phosphosite 10:	ACOX2	Q99424	S9	GSPVHRVSLGDTWSR	62 / 8 AA	77
Phosphosite 11:	NIPBL	Q6KC79	S1009	VVVLQKLSLDDVQKL	75 / 8 AA	316
Phosphosite 12:	B4GALNT3	Q6L9W6	S89	FYHPQRLSLEDHDID	75 / 8 AA	115
Phosphosite 13:	CIB3	Q96Q77	S165	GDHDGRLSLEDFQNM	85 / 7 AA	22
Phosphosite 14:	TAS2R3	Q9NYW6	S44	KTKRMSLSDFIITTL	71 / 7 AA	36
Phosphosite 15:	IRS1	P35568	S862	LARPTRLSLGDPKAS	100 / 6 AA	132
Phosphosite 16:	XRCC3	O43542	S83	PTQHQRLSLGCPVLD	100 / 6 AA	38
Phosphosite 17:	CTTNBP2	Q8WZ74	S1521	LNLDQRLSLGSDDEA	100 / 6 AA	181
Phosphosite 18:	MBD4	O95243	S10	TTGLESLSLGDRGAA	75 / 8 AA	66
Phosphosite 19:	LRRC16A	Q5VZK9	S550	ESPLQSLSLADSKLK	75 / 8 AA	152
Phosphosite 20:	PDZD2	O15018	S379	AHRDGRLSLGDELLV	100 / 6 AA	302