$2\mathrm{.}1.$

Which

amino

acid

$($s$)$

from

the

Resist

protein

can

form

hydrogen

bonds

with

substrate

$1?$

$2\mathrm{.}2.$

Which

amino

acid

$($s$)$

from

the

Resist

protein

can

form

van

der

Waals

force

with

substrate

$1?$

$2\mathrm{.}3.$

Which

amino

acid

$($s$)$

from

the

Resist

protein

can

form

ionic

bonds

with

substrate

$1?$

$2\mathrm{.}4.$

Which

amino

acid

$($s$)$

from

the

Resist

protein

can

form

covalent

bonds

with

substrate

$1?$