sortChIC testdata package

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Test data from the protocol single-cell sortChIC, presented in Zeller, Yueng et. al., Nat. Gen . This dataset includes BAM files that represent MNase cuts targetted at **H3K27me1** histone mark in single-cells from adult mouse bone marrow, sorted into 384 well plates, along with associated metadata. 
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List of contents:
 - <strong>4x BAM files</strong> (indexed), that contain data from 4x 384-well plates, reads are subsetted for **chromosome 1** (mm10/GRCm38)
 - <strong>mm10_chr1.2bit:</strong> 2-bit file storing the sequence information for mouse chromosome 1
 - <strong>mm10_blacklist.bed:</strong> blacklisted regions to avoid
 - <strong>sortChIC_barcodes.txt:</strong> barcodes corresponding to the 384-well plate
 - <strong>metadata.txt:</strong> metadata file that defines cell types from FACS label
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Links for reference: 
 - https://www.nature.com/articles/s41588-022-01260-3
 - https://github.com/vivekbhr/sincei

本数据集源自Zeller、Yueng等学者发表于《自然·遗传学》（*Nat. Gen.*）的单细胞sortChIC实验方案的测试数据。该数据集包含成年小鼠骨髓单细胞中靶向**H3K27me1**组蛋白修饰的微球菌核酸酶（MNase）酶切位点数据的BAM（Binary Alignment Map）文件，这些细胞已被分选至384孔板中，同时附带相关元数据。

数据集内容清单如下：
- 4个索引化BAM文件：涵盖4块384孔板的测序数据，仅保留了小鼠染色体1（mm10/GRCm38）的测序读段；
- mm10_chr1.2bit：存储小鼠染色体1序列信息的2-bit格式文件；
- mm10_blacklist.bed：需规避的基因组黑名单区域文件；
- sortChIC_barcodes.txt：对应384孔板的条形码信息文件；
- metadata.txt：基于荧光激活细胞分选（FACS）标记定义细胞类型的元数据文件。

参考链接：
- https://www.nature.com/articles/s41588-022-01260-3
- https://github.com/vivekbhr/sincei