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:	S887
P-Site Sequence:	SPHLHKDSQQILKED
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	S887	SPHLHKDSQQILKED	100 / 9 AA	119
Phosphosite 1:	TLR5	O60602	S833	GWFLHKLSQQILKKE	88 / 9 AA	98
Phosphosite 2:	Putative maltase-glucoamylase-like protein FLJ16351	Q6ZN80	S347	SKTLCMESQQILPDS	66 / 9 AA	74
Phosphosite 3:	MGAM	O43451	S1466	SKTLCMESQQILPDG	66 / 9 AA	210
Phosphosite 4:	ALS2	Q96Q42	S1335	SRRQHRDSPEILSRS	62 / 8 AA	184
Phosphosite 5:	WDR59	Q6PJI9	S203	GLDWHPDSEHILATS	55 / 9 AA	110
Phosphosite 6:	COL17A1	Q9UMD9	S544	KIGLHSDSQEELWMF	66 / 9 AA	150
Phosphosite 7:	RECQL5	O94762	S761	ATAAHKDSQSIARFF	85 / 7 AA	109
Phosphosite 8:	ALS2CL	Q60I27	S56	LLQQLHKSSQQLWEV	75 / 8 AA	108
Phosphosite 9:	SMU1	Q2TAY7	S319	CLSFSKDSSQILSAS	66 / 9 AA	58
Phosphosite 10:	ZNF518B	Q9C0D4	S524	GRNLHSSSQQLLPFA	66 / 9 AA	120
Phosphosite 11:	SMU1	Q2TAY7	S320	LSFSKDSSQILSASF	85 / 7 AA	58
Phosphosite 12:	UPF3A	Q9H1J1	S37	EVQFHRDSQQQEAET	71 / 7 AA	55
Phosphosite 13:	KAP	P61109	S68	DDDLSTDSEQIMDFT	55 / 9 AA	13
Phosphosite 14:	TBC1D20	Q96BZ9	Y96	LRQMSKDYQQVLLDV	55 / 9 AA	46
Phosphosite 15:	SPTBN4	Q9H254	S1695	LEMGHPDSEQISRRQ	71 / 7 AA	289
Phosphosite 16:	RUVBL2	Q9Y230	T367	TPYSEKDTKQILRIR	71 / 7 AA	51
Phosphosite 17:	COL17A1	Q9UMD9	S542	LDKIGLHSDSQEELW	71 / 7 AA	150
Phosphosite 18:	DNAH14	Q0VDD8	S2305	MEKLRKDSQVVEKVQ	62 / 8 AA	400
Phosphosite 19:	CATSPERB	Q9H7T0	S856	ISGVHKDSQGFNLIK	62 / 8 AA	127
Phosphosite 20:	KLHL38	Q2WGJ6	S295	LLGGRKDSQQTTRDV	71 / 7 AA	66