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:	CDK13
Human P-Site:	S231
P-Site Sequence:	GGSEASKSRSRHSHS
UniProt:	Q14004
Intern. Prot. ID:	IPI00456970

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	CDK13	Q14004	S231	GGSEASKSRSRHSHS	100 / 9 AA	165
Phosphosite 1:	PCM1	Q15154	S1330	STCEPCKSRNRHSAQ	66 / 9 AA	228
Phosphosite 2:	SKIL	P12757	S433	TKTEASKSISRQSEK	77 / 9 AA	77
Phosphosite 3:	KIAA0443	Q96D09	T254	WPREESNTRSRHRAK	66 / 9 AA	94
Phosphosite 4:	CDK13	Q14004	S233	SEASKSRSRHSHSGE	100 / 7 AA	165
Phosphosite 5:	CDK13	Q14004	S229	QRGGSEASKSRSRHS	100 / 7 AA	165
Phosphosite 6:	TAF4	O00268	S972	ILMRAAKSRSRQEDP	75 / 8 AA	110
Phosphosite 7:	SAMHD1	Q9Y3Z3	S616	RLREASKSRVQLFKD	100 / 6 AA	72
Phosphosite 8:	SPAG8	Q99932	S12	ESTEGSRSRSRSLDI	75 / 8 AA	45
Phosphosite 9:	ZRSR2	Q15696	S414	SHKRTSKSRERHNSR	75 / 8 AA	58
Phosphosite 10:	ZRSR1	Q15695	S419	SHKRTSKSRERHNSP	75 / 8 AA	58
Phosphosite 11:	SAMHD1	Q9Y3Z3	S614	PTRLREASKSRVQLF	100 / 6 AA	72
Phosphosite 12:	CDK13	Q14004	S431	SRHRLSRSRSRHSSI	85 / 7 AA	165
Phosphosite 13:	CDK13	Q14004	S424	SRHSRSRSRHRLSRS	85 / 7 AA	165
Phosphosite 14:	RUSC2	Q8N2Y8	S86	RSIDSTKSRSRDGRG	55 / 9 AA	161
Phosphosite 15:	CDK13	Q14004	S433	HRLSRSRSRHSSISP	85 / 7 AA	165
Phosphosite 16:	CROP	O95232	S297	RKRSRSRSRHSSRTS	85 / 7 AA	51
Phosphosite 17:	RSRC2	Q7L4I2	S182	RIRSRSRSRSRHRHR	85 / 7 AA	51
Phosphosite 18:	SFRS4	Q08170	S198	HSRSRSRSRHSRKSR	85 / 7 AA	57
Phosphosite 19:	SFRS4	Q08170	S196	RSHSRSRSRSRHSRK	85 / 7 AA	57
Phosphosite 20:	RSRC2	Q7L4I2	S184	RSRSRSRSRHRHRTR	85 / 7 AA	51