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:	C4orf21
Human P-Site:	T850
P-Site Sequence:	EILKKKNTVFQQGTQ
UniProt:	Q86YA3
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	C4orf21	Q86YA3	T850	EILKKKNTVFQQGTQ	100 / 9 AA	119
Phosphosite 1:	ATP1A2	P50993	S940	ICKTRRNSVFQQGMK	62 / 8 AA	112
Phosphosite 2:	ATP1A3	P13637	S933	ICKTRRNSVFQQGMK	62 / 8 AA	112
Phosphosite 3:	ATP1A1	P05023	S943	ICKTRRNSVFQQGMK	62 / 8 AA	113
Phosphosite 4:	CCDC76	Q9NUP7	S233	GKHRKKNSVFERLQI	55 / 9 AA	54
Phosphosite 5:	HMG20A	Q9NP66	T279	IQERSRNTVLQQHLE	55 / 9 AA	40
Phosphosite 6:	CRISP2	P16562	T181	NNMNRKNTPYQQGTP	55 / 9 AA	27
Phosphosite 7:	ABCG2	Q9UNQ0	T362	GEKKKKITVFKEISY	66 / 9 AA	72
Phosphosite 8:	SLC9A11	Q5TAH2	T1108	NVMASVNTVFEQPGK	83 / 6 AA	129
Phosphosite 9:	TNFRSF21	O75509	T584	ITKEKKDTVLRQVRL	62 / 8 AA	72
Phosphosite 10:	CCDC15	Q0P6D6	S196	TVIKKKGSVFPDDGR	55 / 9 AA	110
Phosphosite 11:	STIM2	Q9P246	T393	KIKKKRSTVFGTLHV	71 / 7 AA	84
Phosphosite 12:	HIC2	Q96JB3	T91	DTDMVSSTVFQQILD	83 / 6 AA	66
Phosphosite 13:	STIM2	Q9P246	S392	EKIKKKRSTVFGTLH	71 / 7 AA	84
Phosphosite 14:	CRISP2	P16562	Y183	MNRKNTPYQQGTPCA	71 / 7 AA	27
Phosphosite 15:	IQGAP2	Q13586	T389	KIKKKRNTLFGTFHV	71 / 7 AA	181
Phosphosite 16:	TPH1	P17752	T176	EEIKTWGTVFQELNK	55 / 9 AA	51
Phosphosite 17:	MYBPC3	Q14896	S362	MRRDEKKSTAFQKKL	71 / 7 AA	141
Phosphosite 18:	TLN1	Q9Y490	S429	DSVSPKKSTVLQQQY	71 / 7 AA	270
Phosphosite 19:	PLCL4	O75038	T1307	TEQLRWLTVFQQAGD	62 / 8 AA	68
Phosphosite 20:	MYBPC3	Q14896	T363	RRDEKKSTAFQKKLE	71 / 7 AA	141