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:	S228
P-Site Sequence:	DDTKMQKSLSLLDAE
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	S228	DDTKMQKSLSLLDAE	100 / 9 AA	52
Phosphosite 1:	SEC23A	Q15436	S154	LKESMQMSLSLLPPT	87 / 8 AA	86
Phosphosite 2:	IGSF21	Q96ID5	S230	TKMQKSLSLLDAENR	100 / 7 AA	52
Phosphosite 3:	FAM179A	Q6ZUX3	S231	NDEKMQKSLGAIVIP	85 / 7 AA	111
Phosphosite 4:	SFRS18	Q8TF01	S465	FIHKEQNSLSLLEAR	77 / 9 AA	93
Phosphosite 5:	E2F7	Q96AV8	S146	RPSRKQKSLGLLCQK	66 / 9 AA	100
Phosphosite 6:	SLAIN2	Q9P270	S145	KLTPMQKSVSPLVWC	75 / 8 AA	63
Phosphosite 7:	TTC14	Q96N46	S432	LHKYMQKSLELREKQ	85 / 7 AA	88
Phosphosite 8:	FRMPD3	Q5JV73	S925	LSEQKNLSLLSPVPE	85 / 7 AA	199
Phosphosite 9:	SFRS18	Q8TF01	S467	HKEQNSLSLLEAREA	85 / 7 AA	93
Phosphosite 10:	MED12	Q93074	S1472	RDRQKQKSMSLLSQQ	85 / 7 AA	243
Phosphosite 11:	MED12L	Q86YW9	S1458	RDRQKQKSMSLLSQQ	85 / 7 AA	240
Phosphosite 12:	SGOL1	Q5FBB7	S328	PQKKMHKSVSSNDAY	71 / 7 AA	64
Phosphosite 13:	EEFSEC	P57772	T170	MTKKMQKTLENTKFR	83 / 6 AA	65
Phosphosite 14:	MED12	Q93074	S1474	RQKQKSMSLLSQQPF	85 / 7 AA	243
Phosphosite 15:	MED12L	Q86YW9	S1460	RQKQKSMSLLSQQPF	85 / 7 AA	240
Phosphosite 16:	Cdc27	P30260	S143	ECYQKSLSLNPFLWS	100 / 6 AA	92
Phosphosite 17:	Cdc27	P30260	S141	GSECYQKSLSLNPFL	100 / 6 AA	92
Phosphosite 18:	IGHG4	P01861	S320	HNHYTQKSLSLSLGK	85 / 7 AA	36
Phosphosite 19:	IGHG2	P01859	S319	HNHYTQKSLSLSPGK	85 / 7 AA	36
Phosphosite 20:	IGHG1	P01857	S323	HNHYTQKSLSLSPGK	85 / 7 AA	36