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| PR:Q00403-1 | transcription initiation factor IIB isoform 1 (human) | | |  | | |
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| PR:Q00403 | transcription initiation factor IIB (human) | | |  | | |
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| PR:Q00403-1 | transcription initiation factor IIB isoform 1 (human) | | |  | | |
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| PR:Q00403 | transcription initiation factor IIB (human) | | |  | | |
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| PR:Q00403-1 | transcription initiation factor IIB isoform 1 (human) | | |  | | |