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:	CD28
Human P-Site:	Y191
P-Site Sequence:	SRLLHSDYMNMTPRR
UniProt:	P10747
Intern. Prot. ID:	IPI00022339

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	CD28	P10747	Y191	SRLLHSDYMNMTPRR	100 / 9 AA	25
Phosphosite 1:	CD28	P10747	S189	KRSRLLHSDYMNMTP	100 / 7 AA	25
Phosphosite 2:	XPNPEP3	Q9NQH7	S216	PSHAQLHSDYMQPLT	100 / 6 AA	57
Phosphosite 3:	XPNPEP3	Q9NQH7	Y218	HAQLHSDYMQPLTEA	100 / 6 AA	57
Phosphosite 4:	FILIP1	Q7Z7B0	Y193	EKHKHTDYMNKSDDF	62 / 8 AA	138
Phosphosite 5:	NPAS3	Q8IXF0	Y353	CENRISDYMDLTPVD	71 / 7 AA	101
Phosphosite 6:	PTPRN2	Q92932	Y800	NSHSHSDYINASPIM	62 / 8 AA	111
Phosphosite 7:	IRS1	P35568	Y732	LLPCTGDYMNMSPVG	71 / 7 AA	132
Phosphosite 8:	BDP1	Q99952	S84	LLQEEGHSDYINGNF	83 / 6 AA	50
Phosphosite 9:	PTPRT	O14522	Y964	DGDPHSDYINANYID	83 / 6 AA	164
Phosphosite 10:	BDP1	Q99952	Y86	QEEGHSDYINGNFIR	83 / 6 AA	50
Phosphosite 11:	PTPRG	P23470	Y906	KDSKHSDYINANYVD	83 / 6 AA	162
Phosphosite 12:	LAX1	Q8IWV1	Y268	SSQISNDYVNMTGLD	71 / 7 AA	44
Phosphosite 13:	CADM1	Q9BY67	S324	NIVGKAHSDYMLYVY	100 / 5 AA	49
Phosphosite 14:	Myomesin 1	P52179	Y136	KENLPSDYMVPIFSG	83 / 6 AA	188
Phosphosite 15:	GCNT1	Q02742	Y93	PRWTPDDYINMTSDC	83 / 6 AA	50
Phosphosite 16:	PTPRN2	Q92932	S798	AENSHSHSDYINASP	83 / 6 AA	111
Phosphosite 17:	IRS2	Q9Y4H2	Y978	QRSPLSDYMNLDFSS	83 / 6 AA	137
Phosphosite 18:	Myomesin 1	P52179	S134	EEKENLPSDYMVPIF	83 / 6 AA	188
Phosphosite 19:	CD28	P10747	T195	HSDYMNMTPRRPGPT	100 / 5 AA	25
Phosphosite 20:	CADM1	Q9BY67	Y326	VGKAHSDYMLYVYDP	100 / 5 AA	49