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:	PCSK4
Human P-Site:	S335
P-Site Sequence:	QGRVPWYSEACASTL
UniProt:	Q6UW60
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	PCSK4	Q6UW60	S335	QGRVPWYSEACASTL	100 / 9 AA	83
Phosphosite 1:	FURIN	P09958	S330	FGNVPWYSEACSSTL	88 / 9 AA	87
Phosphosite 2:	FURIN	P09958	Y329	QFGNVPWYSEACSST	100 / 8 AA	87
Phosphosite 3:	PCSK4	Q6UW60	Y334	QQGRVPWYSEACAST	100 / 8 AA	83
Phosphosite 4:	SH2D6	Q7Z4S9	Y66	DLLTQPWYSGNCDRY	71 / 7 AA	19
Phosphosite 5:	C1orf105	O95561	S20	FDKIPWLSEASLVNK	62 / 8 AA	21
Phosphosite 6:	TMEM151A	Q8N4L1	S359	SNRQLVPSYSEAVVM	85 / 7 AA	51
Phosphosite 7:	BLNK	Q8WV28	Y347	GVLCKPWYAGACDRK	71 / 7 AA	50
Phosphosite 8:	RS1	O15537	Y34	DEGEDPWYQKACKCD	71 / 7 AA	26
Phosphosite 9:	CAGE1	Q8TC20	S277	SAGISWRSEACRENC	62 / 8 AA	90
Phosphosite 10:	DDX51	Q8N8A6	Y646	LQPLVPRYEEALSQL	71 / 7 AA	72
Phosphosite 11:	SLU7	O95391	Y73	YISSVPWYIDPSKRP	50 / 8 AA	68
Phosphosite 12:	DDR2	Q16832	Y521	GPEGVPHYAEADIVN	71 / 7 AA	97
Phosphosite 13:	C14orf115	Q9H8Y1	S477	GAVIPWKSEAEEGAG	71 / 7 AA	78
Phosphosite 14:	DDR1	Q08345	Y569	PQNSVPHYAEADIVT	71 / 7 AA	101
Phosphosite 15:	B4GALNT3	Q6L9W6	S116	NKPVPWLSEFRGRAN	83 / 6 AA	115
Phosphosite 16:	C17orf27	Q63HN8	S3092	SGQLQSYSDACEVLS	50 / 8 AA	374
Phosphosite 17:	ASAH1	Q13510	Y50	YRGAVPWYTINLDLP	80 / 5 AA	45
Phosphosite 18:	ASAH1	Q13510	T51	RGAVPWYTINLDLPP	80 / 5 AA	45
Phosphosite 19:	DUSP5	Q16690	S216	LNVSRRTSEACATHL	62 / 8 AA	42
Phosphosite 20:	ZNF510	Q9Y2H8	S107	QGEEPWFSEEEFSNQ	66 / 6 AA	79