TABLE 2.

Properties of putative sfp gene products and comparison to the corresponding Pap proteins^a

Protein	Molecular mass overall (kDa)	Signal peptide (amino acids)c	Molecular mass of mature protein (kDa)	pI of mature protein	G+C content of respective gene (%)
SfpA	17.9 [18.7]	20	15.9 [16.6]	4.93 [4.72]	41.9 [44.1]
SfpH	21.3 [21.8]	19	19.1 [19.3]	7.17 [5.36]	53.2 [48.8]
SfpC	91.9 [91.1]	27	89.1 [88.3]	6.08 [5.92]	56.1 [52.5]
SfpD	26.9 [26.8]	26	24.2 [24.6]	9.72 [9.01]	47.7 [45.6]
SfpJ	21.1 [20.7]	20	19.1 [17.8]	4.80 [7.11]	40.2 [55.5]
SfpFb	9.3 [17.6]	None			34.5 [42.9]
SfpG	36.2 [38.3]	22	33.5 [35.9]	5.52 [5.59]	36.0 [38.3]

^aNumbers in brackets indicate values for the corresponding pap protein. 

^bTranslated starting from the first ATG codon of the putative nonfunctional sfpF gene; see the text for further details. 

^cPredicted using the method of von Heijne (60).