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:	S452
P-Site Sequence:	DKGCIKESVLIKENA
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	S452	DKGCIKESVLIKENA	100 / 9 AA	119
Phosphosite 1:	HOXB2	P14652	S40	QTSSIKESTLIPPPP	75 / 8 AA	38
Phosphosite 2:	HOXB2	P14652	T41	TSSIKESTLIPPPPP	85 / 7 AA	38
Phosphosite 3:	SDR42E1	Q8WUS8	S10	PKRSQKESVLITGGS	100 / 6 AA	44
Phosphosite 4:	FAM122A	Q96E09	S197	PINCIRPSVLGPLKR	71 / 7 AA	31
Phosphosite 5:	FAM122B	Q7Z309	S159	PVKCIRPSVLGPLKR	71 / 7 AA	27
Phosphosite 6:	SMCR8	Q8TEV9	S424	SYKSSVESVLIKMEQ	100 / 6 AA	105
Phosphosite 7:	SYMPK	Q92797	S486	EKVVKTESVLIKRRL	100 / 6 AA	141
Phosphosite 8:	senataxin	Q7Z333	S655	EPMKVQDSVLIKADN	62 / 8 AA	303
Phosphosite 9:	GAS8	O95995	S136	KEHRIQESVLRKDMR	75 / 8 AA	56
Phosphosite 10:	TRIM22	Q8IYM9	S46	ITAKIKESVIISRGE	85 / 7 AA	57
Phosphosite 11:	NMDAR2D	O15399	S459	SGTCIRDSVPCRSQL	44 / 9 AA	144
Phosphosite 12:	SUPT7L	O94864	S177	GFDCANESVLETLTD	71 / 7 AA	46
Phosphosite 13:	TTC15	Q8WVT3	S69	LNEHMMESVLISDSP	62 / 8 AA	79
Phosphosite 14:	MAP3K1	Q13233	S1344	KYGAFKESVVINYTE	62 / 8 AA	164
Phosphosite 15:	ASNA1	O43681	S67	QLSKGRESVLIISTD	83 / 6 AA	39
Phosphosite 16:	NUDT13	Q86X67	S93	DAQRIEDSVLIGCSE	71 / 7 AA	40
Phosphosite 17:	F8	P00451	Y574	IGPLLICYKESVDQR	83 / 6 AA	267
Phosphosite 18:	DCHS2	Q6V1P9	S2749	LADVRKESVFISGDQ	83 / 6 AA	322
Phosphosite 19:	CCDC158	Q5M9N0	S948	VRDCITESSLRSDMC	71 / 7 AA	127
Phosphosite 20:	TPTE	P56180	S58	RVSPISESVLARLSK	62 / 8 AA	64