Table 1

Expression of β-keratin Sequences in Chicken Tissue:

Sequence annotation

Cultured Newborn chick Keratinocytes

Embryonic chick claw tissue

Embryonic chick scale tissue

Embryonic chick feather

Adult chick feather

Embryonic chick beak


Claw

++

++++

++

+

unknown

+++


Feather

++

+*

+*

++++

++++

+*


Feather-like

unknown

none

+

++

++

none


Scale

++

+*

++++

+

unknown

+*


Keratinocyte

++

unknown

unknown

unknown

unknown

unknown


The sequence annotation for each type of β-keratin gene (claw, feather, feather-like, scale, and keratinocyte) is listed in the left column. The expression level is indicated as plus (+) signs, with more plus signs signifying higher levels of expression. The tissue source and developmental stage is designate at the top of each column. An asterisk indicates that a positive reaction was seen with antiserum for that specific β-keratin sequence [11-14,64].

Greenwold and Sawyer BMC Evolutionary Biology 2010 10:148   doi:10.1186/1471-2148-10-148

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