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:	PRPF4B
Human P-Site:	S453
P-Site Sequence:	PIRRRSRSPLRRSRS
UniProt:	Q13523
Intern. Prot. ID:	IPI00013721

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	PRPF4B	Q13523	S453	PIRRRSRSPLRRSRS	100 / 9 AA	117
Phosphosite 1:	SON	P18583	T2022	VRLRRSRTPLRRRFS	88 / 9 AA	264
Phosphosite 2:	PRPF4B	Q13523	S445	PTRRRSRSPIRRRSR	88 / 9 AA	117
Phosphosite 3:	SRRM1	Q8IYB3	S343	PRHRRSRSPVRRRRR	88 / 9 AA	102
Phosphosite 4:	RBM15	Q96T37	S259	VSRRRSRSPLDKDTY	100 / 7 AA	107
Phosphosite 5:	RBM4	Q9BWF3	S309	SYYGRDRSPLRRATA	87 / 8 AA	40
Phosphosite 6:	RBM4B	Q9BQ04	S304	SYYGRDRSPLRRAAA	87 / 8 AA	40
Phosphosite 7:	RBM14	Q96PK6	S215	PFFGRDRSPLRRSPP	87 / 8 AA	69
Phosphosite 8:	BOP1	Q14137	S573	LSRRRSQSPFRRSHG	77 / 9 AA	84
Phosphosite 9:	PRPF4B	Q13523	S368	DKSRRSRSPLLNDRR	100 / 7 AA	117
Phosphosite 10:	PRPF4B	Q13523	S366	PRDKSRRSRSPLLND	100 / 7 AA	117
Phosphosite 11:	PRPF4B	Q13523	S451	RSPIRRRSRSPLRRS	100 / 7 AA	117
Phosphosite 12:	RBM15	Q96T37	S257	VYVSRRRSRSPLDKD	100 / 7 AA	107
Phosphosite 13:	PRPF38A	Q8NAV1	S245	SPRRRSRSPKRRSPS	88 / 9 AA	37
Phosphosite 14:	PRPF4B	Q13523	S479	DRGRRSRSRLRRRSR	88 / 9 AA	117
Phosphosite 15:	TMEM149	Q9H665	S307	YSLRPSRSPLRALIE	87 / 8 AA	38
Phosphosite 16:	RNPS1	Q15287	S289	PVRRRSRSPGRRRHR	88 / 9 AA	34
Phosphosite 17:	CDK12	Q9NYV4	S222	SPKRRSRSPHRKWSD	77 / 9 AA	164
Phosphosite 18:	ZNF638	Q14966	S510	HRFRRSRSPMHYMYR	75 / 8 AA	221
Phosphosite 19:	SRRM2	Q9UQ35	S527	QRWGRSRSPQRRGRS	87 / 8 AA	300
Phosphosite 20:	DDB2	Q92466	S26	PRNKRSRSPLELEPE	85 / 7 AA	48