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:	T984
P-Site Sequence:	ETPELPSTCMQIDFL
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	T984	ETPELPSTCMQIDFL	100 / 9 AA	119
Phosphosite 1:	SPT5	O00267	T739	ARVELHSTCQTISVD	66 / 9 AA	121
Phosphosite 2:	HSPA4	P34932	T778	KIKELTSTCSPIISK	66 / 9 AA	94
Phosphosite 3:	ATXN1L	P0C7T5	S136	YAQLPSTSLQFIGSP	62 / 8 AA	73
Phosphosite 4:	WDR21C	Q8NA75	S52	IARELRVSCMQRKKV	62 / 8 AA	44
Phosphosite 5:	SP100	P23497	T608	KQSELPVTCGEVKGT	55 / 9 AA	100
Phosphosite 6:	NMT2	O60551	T408	SFYTLPSTVMHHPAH	71 / 7 AA	57
Phosphosite 7:	MAMLD1	Q13495	T267	ISYSIPSTSKQIVSP	62 / 8 AA	83
Phosphosite 8:	MAMLD1	Q13495	S268	SYSIPSTSKQIVSPS	62 / 8 AA	83
Phosphosite 9:	KIAA1931	Q96PV7	T315	QSSHLPSTSMPLLKM	62 / 8 AA	97
Phosphosite 10:	KIAA1931	Q96PV7	S316	SSHLPSTSMPLLKMP	62 / 8 AA	97
Phosphosite 11:	TNRC6A	Q8NDV7	S251	GSDPELASECMDADS	62 / 8 AA	210
Phosphosite 12:	DNASE2B	Q8WZ79	S277	RKRQELPSNCSLPYH	83 / 6 AA	42
Phosphosite 13:	NPR2	P20594	T700	SGNPLPTTGMQKADV	71 / 7 AA	117
Phosphosite 14:	MLK4	Q5TCX8	T783	PPTSLPSTCGEASSP	71 / 7 AA	114
Phosphosite 15:	RHOBTB3	O94955	T144	QNEELPCTCPLCTSD	83 / 6 AA	69
Phosphosite 16:	NR4A3	Q92570	S130	PEDEVLPSTSMYFKQ	83 / 6 AA	68
Phosphosite 17:	KIAA1931	Q96PV7	S314	CQSSHLPSTSMPLLK	71 / 7 AA	97
Phosphosite 18:	NR4A3	Q92570	S132	DEVLPSTSMYFKQSP	83 / 6 AA	68
Phosphosite 19:	LRRC57	Q8N9N7	T103	HLRELPSTFGQLSAL	66 / 9 AA	27
Phosphosite 20:	MLK4	Q5TCX8	S782	SPPTSLPSTCGEASS	71 / 7 AA	114