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:	S171
P-Site Sequence:	PGPPTLFSIRTEPPA
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	S171	PGPPTLFSIRTEPPA	100 / 9 AA	63
Phosphosite 1:	USP21	Q9UK80	T174	PTLFSIRTEPPASHG	100 / 6 AA	63
Phosphosite 2:	ZNF271	Q14591	S639	VCTPTLFSTRDTVPE	85 / 7 AA	76
Phosphosite 3:	IFT172	Q9UG01	S430	GNNDTLGSVRTEFMN	75 / 8 AA	198
Phosphosite 4:	USP21	Q9UK80	T168	GGFPGPPTLFSIRTE	100 / 6 AA	63
Phosphosite 5:	COL27A1	Q8IZC6	T1824	RWHQTLFTFRTQDPQ	55 / 9 AA	187
Phosphosite 6:	F8	P00451	Y2175	IRLHPTHYSIRSTLR	62 / 8 AA	267
Phosphosite 7:	HIPK3	Q9H422	S645	HGKPTSYSIRVDNTV	55 / 9 AA	134
Phosphosite 8:	F8	P00451	S2176	RLHPTHYSIRSTLRM	62 / 8 AA	267
Phosphosite 9:	DOCK9	Q9BZ29	S1492	CCNSKLSSIRTEASQ	66 / 9 AA	236
Phosphosite 10:	SMO	Q99835	S428	RGVMTLFSIKSNHPG	62 / 8 AA	86
Phosphosite 11:	GPR19	Q15760	S331	ASKPTLYSIYNANFR	83 / 6 AA	48
Phosphosite 12:	GPR19	Q15760	Y330	SASKPTLYSIYNANF	83 / 6 AA	48
Phosphosite 13:	SATB1	Q01826	S742	KNTNTLFSVKLEEEL	62 / 8 AA	86
Phosphosite 14:	GHF1	P28069	S282	SLNQSLFSISKEHLE	55 / 9 AA	33
Phosphosite 15:	VPRBP	Q9Y4B6	S1006	PSPPTLDSIITEYLR	77 / 9 AA	169
Phosphosite 16:	MGAT5B	Q3V5L5	T56	RLGDSPFTIRTEVMG	83 / 6 AA	90
Phosphosite 17:	OSGIN1	Q9UJX0	T32	TSSELFSTRTQPQPQ	71 / 7 AA	61
Phosphosite 18:	OSGIN1	Q9UJX0	S31	LTSSELFSTRTQPQP	71 / 7 AA	61
Phosphosite 19:	IKBKAP	O95163	S25	PGNPQCFSLRTEQGT	83 / 6 AA	150
Phosphosite 20:	HIPK3	Q9H422	S643	ATHGKPTSYSIRVDN	71 / 7 AA	134