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:	ARPP-21
Human P-Site:	S258
P-Site Sequence:	ILKRDNSSIDKEDNQ
UniProt:	Q9UBL0
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	ARPP-21	Q9UBL0	S258	ILKRDNSSIDKEDNQ	100 / 9 AA	89
Phosphosite 1:	ARPP-21	Q9UBL0	S257	FILKRDNSSIDKEDN	100 / 8 AA	89
Phosphosite 2:	R3HDM1	Q15032	S262	ILKRDNSSFDKDDNQ	77 / 9 AA	121
Phosphosite 3:	R3HDM1	Q15032	S261	YILKRDNSSFDKDDN	87 / 8 AA	121
Phosphosite 4:	IL17D	Q8TAD2	S183	DADSINSSIDKQGAK	85 / 7 AA	22
Phosphosite 5:	CCDC50	Q8IVM0	S226	KAKEREKSSLDKRKQ	62 / 8 AA	36
Phosphosite 6:	LRBA	P50851	S993	TTNGNENSSIEKTSS	71 / 7 AA	319
Phosphosite 7:	LRBA	P50851	S994	TNGNENSSIEKTSSL	71 / 7 AA	319
Phosphosite 8:	DPH3B	Q9H4G8	S33	CPCGDNFSITKEELE	75 / 8 AA	9
Phosphosite 9:	DPH3	Q96FX2	S33	CPCGDNFSITKEDLE	75 / 8 AA	9
Phosphosite 10:	ZNF454	Q8N9F8	S397	GKAFRDNSSFARHRK	62 / 8 AA	60
Phosphosite 11:	MMP1	P03956	S172	RGDHRDNSPFDGPGG	71 / 7 AA	54
Phosphosite 12:	ZNF454	Q8N9F8	S398	KAFRDNSSFARHRKI	62 / 8 AA	60
Phosphosite 13:	GPRIN1	Q7Z2K8	S165	SKQADSTSIGKEDPG	62 / 8 AA	102
Phosphosite 14:	CCDC108	Q6ZU64	S1425	NISSWDNSSIHSRLV	83 / 6 AA	217
Phosphosite 15:	SIPA1L1	O43166	S211	REYGSTSSIDKQGTS	71 / 7 AA	200
Phosphosite 16:	CCDC108	Q6ZU64	S1426	ISSWDNSSIHSRLVV	71 / 7 AA	217
Phosphosite 17:	ZFP106	Q9H2Y7	S1289	SQSAGLSSINKEGEE	83 / 6 AA	209
Phosphosite 18:	STXBP5	Q5T5C0	S785	SRSSSVTSIDKESRE	83 / 6 AA	128
Phosphosite 19:	LHX1	P48742	S123	EDYLSNSSVAKENSL	71 / 7 AA	45
Phosphosite 20:	CLOCK	O15516	S20	IVDRDDSSIFDGLVE	83 / 6 AA	95