definiens: ) shall be a [COMPANY] Target Pair . For purposes of th e foregoing, means [ … * * * … ] . ” 5 . Section 3.1.2(d ) . Replacement Target Pairs . Section 3.1.2(d ) is hereby amended by adding the following at the end : “ Notwithstanding the foregoing, [COMPANY] shall not hav e the right to propose a replacement Target Pair fo r [ … * * * … ], despite its being an Unavailable Target, a nd the Selection Period for the Initial Target Pair shall not be extended, in each case pursuant to this Section 3.1.2(d ) . ” 6 . Section 3.1.5(b ) . Sequences . The language that comprises Section 3.1.5 prior t o the Amendment Effective Date is hereby renumbered to be Section 3.1.5(a ) and a new Section 3.1.5(b ) is hereby added as follows : “ ( b ) Sequence Pair Gatekeeping . Subject to this Section 3.1.5(b ), [COMPANY] shall have the right, during the Research Program Term for the [ ... * * * ... ] Targe t Pair, to designate [COMPANY] Sequence pairs Directed To the [ ... * * * ... ] Target Pair that would be subjec t to the [ ... * * * ... ] License by providing [COMPANY] written notice of such [COMPANY] Sequence pair ( each, a ) . Each pair of [COMPANY] Sequences that is the subject of a Sequence P air Selection Notice shall be subject to gatekeeping pursuant to this Section 3.1.5(b ), and if a designated [COMPANY] Sequence pair is not an Unavailable Sequence Pair in Confidential CONFIDENTIAL accordance with such gatekeeping, it shall become a Subject to Section 3.1.2.(c ), a [COMPANY] Sequence pair Directed T o the [ ... * * * ... ] Target Pair that is designated by [COMPANY] in accordance with this Section 3.1.5(b ) shal l only be an if at the time that [COMPANY] provides the respective Sequenc e Pair Selection Notice : ( i ) [COMPANY] is subject to any of the following ci rcumstances with respect to such [COMPANY] Sequence pair or products or product candidates that contain Antibodies that are derived and generated from suc h [COMPANY] Sequence pair through the application of the [COMPANY] Platform ( each such product or product candidate, a ): ( 1 ) [COMPANY] is either [ … * * * … ] : ( 1 ) such [ … * * * … ] ; or ( 2 ) [ ... * * * ... ] ; or ( 2 ) [COMPANY] is [ … * * * … ] and that ( a ) [COMPANY] or an Affiliate of [COMPANY] [ … * * * … ] or ( b ) [ … * * * … ]