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Have a look at the tissue composition of the Physcomitrella EST data.

We made a GOA (Gene Ontology Association) based on the virtual transcripts that will be available soon.


The average Physcomitrella intron is 252bp long (Arabidopsis: 146; human: 740). On average, the moss contains the same number of introns per gene as Arabidopsis and human (~5).

The splice sites are well conserved and resemble those of Arabidopsis. Have a look at the sequence logos for the donor and acceptor sites. Use our species-specific splice site prediction tool.
The dataset that we used for the training: donor and acceptor sites, each with 50nt up- and downstream.

The Physcomitrella codon usage table. While moss genes on average are as biased as those of Arabidopsis, around 15% of transcripts are completely unbiased.


The haploid genome of Physcomitrella has a size of around 511 Mbp (C-value: 0.53pg), dispersed on 27 chromosomes.


The dominant (gametophytic) genome is haploid. After protoplast transformation a small percentage of polyploid (mostly diploid) transformants occur.

Approximately 8% of the moss protein encoding genes have their closest sequence homolog _not_ among the genes of vascular plants.



The Physcomitrella gametophytic genes are comparable to the sporophytic genes of seed plants.

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The G/C content of the coding regions is close to 50%, there is less codon bias in the moss than in seed plants.


The Physcomitrella transcriptome consists of approximately 25,000 protein-encoding transcripts.


Have a look at the mapping of the Physcomitrella transcripts against the Arabidopsis chromosomes.

Physcomitrella integrates homologous DNA stretches via homologous recombination with an average rate of 50% (surviving transformants).