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. 2007 Apr 1;21(7):835–847. doi: 10.1101/gad.1516207

Figure 1.

Figure 1.

Ubiquitylation of H2B is present in S. pombe and is required for H3K4me and for normal growth. (A) Either the htb1-Flag or htb1-K119R-Flag strain was crossed to an untagged wild-type strain; tetrads were dissected on YES media. Shown are three tetrads from each cross. The slow-growing colonies in the htb1-K119R-Flag cross were all G418-resistant. (B) Anti-Flag Western blots on whole-cell extracts prepared from an untagged strain (htb1+) and the indicated tagged strains. Bands corresponding to H2B-Flag and its ubiquitylated form are indicated on the right. On the left are molecular weight markers (in kilodaltons). The asterisk denotes a probable H2B–SUMO conjugate. (C) Extracts from B were probed with the indicated antibodies.