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:	IGSF21
Human P-Site:	S383
P-Site Sequence:	FTWTRVGSRLLDGSA
UniProt:	Q96ID5
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	IGSF21	Q96ID5	S383	FTWTRVGSRLLDGSA	100 / 9 AA	52
Phosphosite 1:	FTCD	O95954	S70	LNAARVASRLIDMSR	66 / 9 AA	59
Phosphosite 2:	SPEG	Q15772	S398	PRLVRAGSRILDKLQ	75 / 8 AA	354
Phosphosite 3:	TAGAP	Q8N103	S411	FPVPRVGSRLESEEA	100 / 6 AA	81
Phosphosite 4:	SHANK1	Q9Y566	S982	PPDTRVGSREKSLYH	100 / 6 AA	225
Phosphosite 5:	PHRF1	Q9P1Y6	S307	TPGRLGSSLLDEAIE	75 / 8 AA	179
Phosphosite 6:	PHRF1	Q9P1Y6	S306	HTPGRLGSSLLDEAI	75 / 8 AA	179
Phosphosite 7:	MYO18A	Q92614	S1099	LRTQLRGSRLLDAMR	100 / 6 AA	233
Phosphosite 8:	PROP1	O75360	S20	KKGRVGSSLLPERHP	85 / 7 AA	25
Phosphosite 9:	FOXRED2	Q8IWF2	S638	LWQHRVESRLLRDYA	85 / 7 AA	78
Phosphosite 10:	ARHGEF17	Q96PE2	S300	PGLRPGSSLLDQDCR	75 / 8 AA	222
Phosphosite 11:	PRKRIR	O43422	S345	SKMKVVASRLLEKYP	71 / 7 AA	88
Phosphosite 12:	PROP1	O75360	S19	PKKGRVGSSLLPERH	85 / 7 AA	25
Phosphosite 13:	ARHGEF17	Q96PE2	S299	RPGLRPGSSLLDQDC	75 / 8 AA	222
Phosphosite 14:	JPH3	Q8WXH2	S598	SNHSPGGSRLLELQE	55 / 9 AA	81
Phosphosite 15:	THOC5	Q13769	S485	LLKTRVQSRLALHKQ	85 / 7 AA	79
Phosphosite 16:	GRIPAP1	Q4V328	S399	QESLRANSRLLEQLQ	62 / 8 AA	96
Phosphosite 17:	RbBP2	P29375	S144	KKWSKVGSRLGYLPG	71 / 7 AA	192
Phosphosite 18:	PEX3	P56589	S289	TCLNRGFSRLLDNMA	66 / 9 AA	42
Phosphosite 19:	EHBP1L1	Q8N3D4	S895	EAETRVGSALKYEAL	85 / 7 AA	162
Phosphosite 20:	C2orf67	A0AUZ9	S380	VDRARVGSRWTWLQA	71 / 7 AA	112