[BioC] GOTERM in GO.db returns NULL

[Shi, Tao]

Hi list,

I was using GOTERM in GO.db to get the annotations for the GO terms and a few of them return NULL.  But I checked the GO website and using AmiGO, all of them except the last one still exist and have annotations.  The last one, according to this (http://fafner.stanford.edu/pipermail/go/2008-January/015594.html), seems to be obsolete.  There could be other GO terms like these exist.  I'm aware of this could be due to the different version of GO used in the package, but I still want to point out just in case there are other problems.

...Tao  


> GOTERM[["GO:0022904"]]      ## respiratory electron transport chain
NULL
> GOTERM[["GO:0022900"]]      ## electron transport chain
NULL
> GOTERM[["GO:GO:0055114"]]      ## oxidation reduction
NULL
> GOTERM[["GO:0045192"]]      ## low-density lipoprotein catabolic process; obsolete?
NULL
> 
> sessionInfo()
R version 2.7.0 (2008-04-22) 
i386-pc-mingw32 

locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252

attached base packages:
[1] tools     stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] GO.db_2.2.0         AnnotationDbi_1.2.2 RSQLite_0.6-9       DBI_0.2-4           Biobase_2.0.1