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:	CTSB
Human P-Site:	S264
P-Site Sequence:	SDFLLYKSGVYQHVT
UniProt:	P07858
Intern. Prot. ID:	IPI00295741

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	CTSB	P07858	S264	SDFLLYKSGVYQHVT	100 / 9 AA	38
Phosphosite 1:	CTSB	P07858	Y262	VYSDFLLYKSGVYQH	100 / 7 AA	38
Phosphosite 2:	CTSS	P25774	S264	PSFFLYRSGVYYEPS	75 / 8 AA	37
Phosphosite 3:	PDE1C	Q14123	Y245	QTVHYLLYKTGVANW	85 / 7 AA	81
Phosphosite 4:	CTSB	P07858	Y267	LLYKSGVYQHVTGEM	100 / 6 AA	38
Phosphosite 5:	CTSL2	O60911	S262	SSFQFYKSGIYFEPD	71 / 7 AA	37
Phosphosite 6:	OCLM	Q9Y5M6	S29	YLKILYKSGIIWLSW	71 / 7 AA	5
Phosphosite 7:	CTSS	P25774	Y262	RHPSFFLYRSGVYYE	71 / 7 AA	37
Phosphosite 8:	EXOC7	Q9UPT5	S564	QLNLLSKSKVYEDPA	66 / 9 AA	83
Phosphosite 9:	TMTC2	Q8N394	Y484	WQNEEMLYRSGIKVN	57 / 7 AA	94
Phosphosite 10:	DYNLL2	Q96FJ2	S88	VAILLFKSG______	83 / 6 AA	10
Phosphosite 11:	LC8	P63167	S88	VAILLFKSG______	83 / 6 AA	10
Phosphosite 12:	KIAA0329	O15040	Y958	TEQRALLYREGVSSF	71 / 7 AA	154
Phosphosite 13:	OTUB2	Q96DC9	T222	SVYLLYKTSHYNILY	62 / 8 AA	27
Phosphosite 14:	TTC9	Q92623	Y168	GENFKALYRSGVAFY	83 / 6 AA	24
Phosphosite 15:	Lrrc4b	Q9NT99	S702	HEPLLFKSGSKENVQ	83 / 6 AA	76
Phosphosite 16:	CPS1	P31327	Y1069	NNLAVPLYKNGVKIM	83 / 6 AA	165
Phosphosite 17:	AhR (aryl hydrocarbon receptor)	P35869	Y371	QSNARLLYKNGRPDY	83 / 6 AA	96
Phosphosite 18:	SMPD3	Q9NY59	Y325	GANSKLLYKASVVKK	71 / 7 AA	71
Phosphosite 19:	ZNF430	Q9H8G1	S6	__MENLKSGVYPLKE	83 / 6 AA	66
Phosphosite 20:	ZNF430	Q9H8G1	Y9	ENLKSGVYPLKEASG	83 / 6 AA	66