Appendix A to Subpart G of Part 1 - Sample Sequence Listing

Appendix A to Subpart G of Part 1 - List of Nucleotides

Source: World Intellectual Property Organization (WIPO) Handbook on Industrial Property Information and Documentation, Standard ST.25: Standard for the Presentation of Nucleotide and Amino Acid Sequence Listings in Patent Applications (2009).

Symbol	Meaning	Origin of designation
a	a	adenine.
g	g	guanine.
c	c	cytosine.
t	t	thymine.
u	u	uracil.
r	g or a	purine.
y	t/u or c	pyrimidine.
m	a or c	amino.
k	g or t/u	keto.
s	g or c	strong interactions 3H-bonds.
w	a or t/u	weak interactions 2H-bonds.
b	g or c or t/u	not a.
d	a or g or t/u	not c.
h	a or c or t/u	not g.
v	a or g or c	not t, not u.
n	a or g or c or t/u, unknown, or other	any.

[86 FR 57052, Oct. 14, 2021]