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:	S278
P-Site Sequence:	PFRDDRRSKSIEERE
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	S278	PFRDDRRSKSIEERE	100 / 9 AA	89
Phosphosite 1:	R3HDM1	Q15032	S280	RLKDDRRSKSIEERE	100 / 9 AA	121
Phosphosite 2:	ARPP-21	Q9UBL0	S280	RDDRRSKSIEEREEE	100 / 7 AA	89
Phosphosite 3:	R3HDM1	Q15032	S282	KDDRRSKSIEEREEE	100 / 7 AA	121
Phosphosite 4:	NEURL4	Q96JN8	S774	QKMVDRWSGSIEAGV	75 / 8 AA	167
Phosphosite 5:	ZNF331	Q9NQX6	S76	KRNSDRRSKSLGRNW	75 / 8 AA	54
Phosphosite 6:	PRPF38B	Q5VTL8	S529	HDRRRSQSIEQESQE	85 / 7 AA	64
Phosphosite 7:	PRPF38B	Q5VTL8	S527	DKHDRRRSQSIEQES	77 / 9 AA	64
Phosphosite 8:	DDX46	Q7L014	S40	KRGDDRRSRSRDRDR	66 / 9 AA	117
Phosphosite 9:	CLK2	P49760	S142	HSSRRAKSVEDDAEG	71 / 7 AA	60
Phosphosite 10:	RBM23	Q86U06	S206	SDRNSRRSKGIAYVE	55 / 9 AA	49
Phosphosite 11:	MASTL	Q96GX5	S562	CSDDDRASKNISMNS	75 / 8 AA	97
Phosphosite 12:	DAAM1	Q9Y4D1	S131	KEEEEERSKTIESLK	55 / 9 AA	123
Phosphosite 13:	MSH3	P20585	S225	SKSANKRSKSIYTPL	62 / 8 AA	127
Phosphosite 14:	DOCK7	Q96N67	S182	DLKRRSMSIDDTPRG	71 / 7 AA	243
Phosphosite 15:	EIF4G3	O43432	S1226	EEELERKSKSIIDEF	71 / 7 AA	177
Phosphosite 16:	DOCK7	Q96N67	S180	QDDLKRRSMSIDDTP	71 / 7 AA	243
Phosphosite 17:	SHANK1	Q9Y566	S1287	PRLRHSKSIDEGMFS	71 / 7 AA	225
Phosphosite 18:	PRPF4B	Q13523	S307	GKSKDRRSRSKERKS	75 / 8 AA	117
Phosphosite 19:	DCDC2	Q9UHG0	S259	GSGNDRHSKSTVGSS	62 / 8 AA	53
Phosphosite 20:	ACOT12	Q8WYK0	S531	NLGGWSKSIEETAAS	83 / 6 AA	62