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:	POLR1B
Human P-Site:	S281
P-Site Sequence:	DDSFLRNSVSQMLRI
UniProt:	Q9H9Y6
Intern. Prot. ID:	IPI00418797

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	POLR1B	Q9H9Y6	S281	DDSFLRNSVSQMLRI	100 / 9 AA	128
Phosphosite 1:	CYP3A4	P08684	S252	VTNFLRKSVKRMKES	66 / 9 AA	57
Phosphosite 2:	OR2A1	Q8NGT9	T76	DIAYTRNTVPQMLAN	55 / 9 AA	35
Phosphosite 3:	CYP3A43	Q9HB55	S252	VTHFLKNSIERMKES	55 / 9 AA	58
Phosphosite 4:	ROBO4	Q8WZ75	S814	GEETPRNSVSPMPRA	85 / 7 AA	107
Phosphosite 5:	ARHGEF16	Q5VV41	T319	QSKELRATVTQMEHH	62 / 8 AA	80
Phosphosite 6:	PCNX	Q96RV3	S1257	LPEKLRNSVSERLQS	85 / 7 AA	259
Phosphosite 7:	LRRC14	Q15048	S417	LKELLRDSVAQAELR	62 / 8 AA	55
Phosphosite 8:	THBS4	P35443	T254	ETSFLRNTIAECQAC	50 / 8 AA	106
Phosphosite 9:	ROBO4	Q8WZ75	S816	ETPRNSVSPMPRAPS	85 / 7 AA	107
Phosphosite 10:	RbBP2	P29375	S652	EETRLRESVVQMGVL	75 / 8 AA	192
Phosphosite 11:	TRBP	Q15633	S271	TWDSLRNSVGEKILS	62 / 8 AA	39
Phosphosite 12:	ZC3H8	Q8N5P1	S163	SNALLRNSGSQEEDG	75 / 8 AA	34
Phosphosite 13:	SYT16	Q17RD7	S552	GKLFLLNSVGQEMSR	75 / 8 AA	72
Phosphosite 14:	ZMYM3	Q14202	S294	SPRMSLRSSVSQRAG	85 / 7 AA	152
Phosphosite 15:	ZMYM3	Q14202	S295	PRMSLRSSVSQRAGR	85 / 7 AA	152
Phosphosite 16:	RPUSD2	Q8IZ73	T210	DNDFLRNTVHRHEPP	83 / 6 AA	61
Phosphosite 17:	ANKRD30A	Q9BXX3	T931	DSESLRETVSQKDVC	62 / 8 AA	159
Phosphosite 18:	FOXO3	O43524	S553	GSRALSNSVSNMGLS	75 / 8 AA	71
Phosphosite 19:	GOLGA3	Q08378	S216	EYSFLRTSVPRGPKV	62 / 8 AA	167
Phosphosite 20:	SIPA1	Q96FS4	S912	RTLSLRNSISRIMSE	62 / 8 AA	112