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# Table 1 Overview of microorganisms involved in the ruminal degradation of proteins, peptides, AA and urea^{a}

Group | Microbial species | Proteins | Peptides | AA | Urea | Reference |
---|---|---|---|---|---|---|

Bacteria |
Allisonella histaminiformans
| X | [72, 73] | |||

Butyrivibrio fibrisolvens
| X | X | [26, 69] | |||

Butyrivibrio proteoclasticus
| X | [27] | ||||

Clostridium sp.
| X | [77] | ||||

Clostridium aminophilum
| X | [77] | ||||

Clostridium sticklandii
| X | [77] | ||||

Eubacterium sp.
| X | X | [47, 69] | |||

Eubacterium budayi
| X | [27] | ||||

Eubacterium pyruvativorans
| X | [82] | ||||

Eubacterium ruminantium
| X | [53] | ||||

Fibrobacter succinogenes
| X | [53] | ||||

Fusobacterium sp.
| X | [26] | ||||

Howardella ureilytica
| X | [91] | ||||

Klebsiella aerogenes
| X | [88] | ||||

Lachnospira multipara
| X | X | [49, 53] | |||

Lactobacillus casei var. casei
| X | [88] | ||||

Micrococcus varians
| X | [89] | ||||

Megasphaera elsdenii
| X | X | [53] | |||

Peptostreptococcus anaerobius
| X | [77] | ||||

Prevotella sp.
| X | X | X | [54, 70] | ||

Prevotella albensis
| X | X | [39, 61] | |||

Prevotella brevis
| X | X | [52] | |||

Prevotella bryantii
| X | X | [52] | |||

Prevotella ruminicola
| X | X | X | [51, 70] | ||

Ruminobacter amylophilus
| X | [28] | ||||

Selenomonas ruminantium
| X | X | X | [15, 42, 69] | ||

Staphylococcus sp.
| X | [88] | ||||

Staphylococcus saprophyticus
| X | X | X | [89] | ||

Streptococcus bovis
| X | X | X | [27, 53, 69] | ||

Streptococcus faecium
| X | [88] | ||||

Protozoa |
Dasytricha sp.
| X | [96] | |||

Dasytricha ruminantium
| X | X | [94, 104] | |||

Entodinium spp.
| X | X | [103, 104] | |||

Entodinium caudatum
| X | X | [103] | |||

Entodinium simplex
| X | [96, 103] | ||||

Epidinium sp.
| X | [96] | ||||

Epidinium caudatum ecaudatum
| X | [94, 96, 104] | ||||

Isotricha spp.
| X | X | [94, 96] | |||

Ophryoscolex caudatus
| X | [94] | ||||

Polyplastron multivesiculatum
| X | [94] | ||||

Fungi |
Neocallimastix frontalis
| X | X | [114, 118] | ||

Neocallimastix patriciarum
| X | [116] | ||||

Orpinomyces joyonii
| X | [116] | ||||

Piromyces sp.
| X | X | [118] | |||

Piromyces communis
| X | [116] |